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121-569: See text Baltoeurypterus Størmer, 1973 Eurypterus ( / j ʊəˈr ɪ p t ər ə s / yoo- RIP -tər-əs ) is an extinct genus of eurypterid , a group of organisms commonly called "sea scorpions". The genus lived during the Silurian period, from around 432 to 418 million years ago. Eurypterus is by far the most well-studied and well-known eurypterid. Eurypterus fossil specimens probably represent more than 95% of all known eurypterid specimens. There are fifteen species belonging to

242-502: A grand jury on an aggravated assault with a deadly weapon charge but was not charged with any additional hate crime charge. A large student and faculty Pro-Palestinian protest occurred on April 24, 2024, demanding a ceasefire in the Israel-Hamas War and that the university divest from companies profiting from Israel's actions. The protests occurred amidst the ongoing nationwide demonstrations on college campuses . In response,

363-557: A species : see Botanical name and Specific name (zoology) . The rules for the scientific names of organisms are laid down in the nomenclature codes , which allow each species a single unique name that, for animals (including protists ), plants (also including algae and fungi ) and prokaryotes ( bacteria and archaea ), is Latin and binomial in form; this contrasts with common or vernacular names , which are non-standardized, can be non-unique, and typically also vary by country and language of usage. Except for viruses ,

484-413: A 10 PM curfew for all protests, directly contradicting prior guidelines. Initially, the university told students and faculty that arrested protestors would no longer be allowed on campus, but retracted the statement two hours later, stating that they would be allowed "academic" access, only to then announce a change to full access for university affiliates. Additionally, the university temporarily suspended

605-608: A contentious dispute erupted between Texas Governor James E. Ferguson and the University of Texas over faculty appointments. Ferguson's attempt to influence these appointments led to a retaliatory veto of the university's budget, jeopardizing its operations. Subsequently, Ferguson was impeached by the Texas House of Representatives , convicted by the Senate on charges including misapplication of public funds, and removed from office. In 1921,

726-406: A crocodile. Species of Eurypterus , however, were much smaller. E. remipes are usually between 13 and 20 cm (5 and 8 in) in length. E. lacustris average at larger sizes at 15 to 23 cm (6 to 9 in) in length. However, a single telson (the posteriormost division of the body) of a specimen of this species reaches this length, being 14.8 cm (5.8 in) long and indicating

847-646: A general system of education when circumstances allowed. After Texas was annexed , the Seventh Texas Legislature passed O.B. 102 on February 11, 1858, allocating $ 100,000 in United States bonds from the Compromise of 1850 for the University of Texas. The Civil War delayed fund repayment, leaving the university with only $ 16,000 by 1865. Nevertheless, the Texas Constitution of 1876 reaffirmed

968-504: A historically black college, "a place where he is loved". The University of Texas at Austin has experienced a wave of new construction recently with several significant buildings. On April 30, 2006, the school opened the Blanton Museum of Art . In August 2008, the AT&;T Executive Education and Conference Center opened, with the hotel and conference center forming part of a new gateway to

1089-643: A later homonym of a validly published name is a nomen illegitimum or nom. illeg. ; for a full list refer to the International Code of Nomenclature for algae, fungi, and plants and the work cited above by Hawksworth, 2010. In place of the "valid taxon" in zoology, the nearest equivalent in botany is " correct name " or "current name" which can, again, differ or change with alternative taxonomic treatments or new information that results in previously accepted genera being combined or split. Prokaryote and virus codes of nomenclature also exist which serve as

1210-621: A long time and redescribed as new by a range of subsequent workers, or if a range of genera previously considered separate taxa have subsequently been consolidated into one. For example, the World Register of Marine Species presently lists 8 genus-level synonyms for the sperm whale genus Physeter Linnaeus, 1758, and 13 for the bivalve genus Pecten O.F. Müller, 1776. Within the same kingdom, one generic name can apply to one genus only. However, many names have been assigned (usually unintentionally) to two or more different genera. For example,

1331-509: A public school price, having been ranked in virtually every list of "Public Ivies" since Richard Moll coined the term in his 1985 book Public Ivies: A Guide to America's best public undergraduate colleges and universities . The seven other "Public Ivy" universities, according to Moll, were the College of William & Mary, Miami University, the University of California , the University of Michigan ,

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1452-409: A reference for designating currently accepted genus names as opposed to others which may be either reduced to synonymy, or, in the case of prokaryotes, relegated to a status of "names without standing in prokaryotic nomenclature". An available (zoological) or validly published (botanical) name that has been historically applied to a genus but is not regarded as the accepted (current/valid) name for

1573-578: A result of a student referendum passed in 2006 which raised student fees by $ 65 per semester. In 2012, the Moody Foundation awarded the College of Communication $ 50 million, the largest endowment any communication college has received, so naming it the Moody College of Communication. The university operates two public radio stations, KUT with news and information, and KUTX with music, via local FM broadcasts as well as live streaming audio over

1694-413: A result of mass mating and molting behavior. Juveniles were likely to have inhabited nearshore hypersaline environments, safer from predators, and moved to deeper waters as they grew older and larger. Adults that reach sexual maturity would then migrate en masse to shore areas in order to mate, lay eggs, and molt. Activities that would have made them more vulnerable to predators. This could also explain why

1815-645: A rowing stroke when in close proximity to the seafloor. Arcuites bertiensis is an ichnospecies that includes a pair of crescent-shaped impressions and a short medial drag, and it has been found in upper Silurian eurypterid Lagerstatten in Ontario and Pennsylvania. This trace fossil is very similar to traces made by modern aquatic swimming insects that row such as water boatmen , and is considered to have been made by juvenile to adult-sized eurypterids while swimming in very shallow nearshore marine environments. The morphology of A. bertiensis suggests that Eurypterus had

1936-771: A species. The genus Eurypterus derives from E. minor , the oldest known species from the Llandovery of Scotland. E. minor is believed to have diverged from Dolichopterus macrocheirus sometime in the Llandovery. The following is the phylogenetic tree of Eurypterus based on phylogenetic studies by O. Erik Tetlie in 2006. Some species are not represented. Dolichopteridae Eurypterus minor Eurypterus hankeni Eurypterus ornatus Eurypterus dekayi Eurypterus laculatus Eurypterus pittsfordensis Eurypterus leopoldi Eurypterus serratus Eurypterus remipes Eurypterus lacustris Eurypterus henningsmoeni Eurypterus tetragonophthalmus Species belonging to

2057-533: A specimen of 55.4 cm (21.8 in) of length, and that is the largest specimen ever described in literature. In the introduction page of E. remipes in website of University of Texas at Austin says that the largest specimen ever found was 1.3 m (4.3 ft) long, currently on display at the Paleontological Research Institution of New York. However, the text section describes the group eurypterid itself rather than Eurypterus , so it

2178-427: A taxon; however, the names published in suppressed works are made unavailable via the relevant Opinion dealing with the work in question. In botany, similar concepts exist but with different labels. The botanical equivalent of zoology's "available name" is a validly published name . An invalidly published name is a nomen invalidum or nom. inval. ; a rejected name is a nomen rejiciendum or nom. rej. ;

2299-700: A total of 155 Olympic medals . The idea of a public university in Texas was first mentioned in the 1827 constitution of the Mexican state of Coahuila y Tejas , which promised public education in the arts and sciences under Title 6, Article 217, but no action was taken. After Texas gained independence from Mexico in 1836, the Constitution of the Republic emphasized Congress's duty, in Section 5 of its General Provisions, to establish

2420-455: A total of c. 520,000 published names (including synonyms) as at end 2019, increasing at some 2,500 published generic names per year. "Official" registers of taxon names at all ranks, including genera, exist for a few groups only such as viruses and prokaryotes, while for others there are compendia with no "official" standing such as Index Fungorum for fungi, Index Nominum Algarum and AlgaeBase for algae, Index Nominum Genericorum and

2541-561: A transition to online classes for the rest of the spring semester after 49 confirmed COVID-19 cases emerged from students' travels to Cabo San Lucas, Mexico, during spring break. Throughout the summer, the university reported over 400 cases and its first COVID-19-related death, a custodial worker. The fall 2020 semester consisted of a majority of online courses through platforms like Zoom. On August 6, 2020, UT Austin initiated plans for free COVID-19 tests for all students. UT Austin returned to primarily in-person classes and campus activities for

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2662-460: Is based on Dunlop et al. (2011). Eurypterus belongs to the suborder Eurypterina, eurypterids in which the sixth appendage had developed a broad swimming paddle remarkably similar to that of the modern-day swimming crab . Modeling studies on Eurypterus swimming behavior suggest that they utilized a drag-based rowing type of locomotion where appendages moved synchronously in near-horizontal planes. The paddle blades are almost vertically oriented on

2783-596: Is discouraged by both the International Code of Zoological Nomenclature and the International Code of Nomenclature for algae, fungi, and plants , there are some five thousand such names in use in more than one kingdom. For instance, A list of generic homonyms (with their authorities), including both available (validly published) and selected unavailable names, has been compiled by the Interim Register of Marine and Nonmarine Genera (IRMNG). The type genus forms

2904-494: Is further subdivided in two ways. Based on the width and structure of each segment, they can be divided into the broad preabdomen (segments 1 to 7) and the narrow postabdomen (segments 8 to 12). The preabdomen is the broader segments of the anterior portion of the ophisthosoma while the postabdomen are the last five segments of the Eurypterus body . Each of the segments of the postabdomen contain lateral flattened protrusions known as

3025-679: Is listed as the third-best in the nation and The School of Information (iSchool) is sixth-best in Library and Information Sciences. Among other rankings, the School of Social Work is 7th, the Jackson School of Geosciences is 8th for Earth Sciences, the Cockrell School of Engineering is tied for 10th-best (with the undergraduate engineering program tied for 11th-best in the country), the Nursing School

3146-576: Is more energy-efficient. Juveniles probably swam using the rowing type, the rapid acceleration afforded by this propulsion is more suited for quickly escaping predators. A small 16.5 cm (6.5 in) Eurypterus could achieve two and a half body lengths per second immediately. Larger adults, meanwhile, probably swam with the subaqueous flight type. The maximum velocity of adults when cruising would have been 3 to 4 m (9.8 to 13.1 ft) per second, slightly faster than turtles and sea otters . Trace fossil evidence indicates that Eurypterus employed

3267-412: Is not possible to determine in context whether the 1.3 m (4.3 ft) long specimen is actually from E. remipes or another eurypterid. Eurypterus fossils often occur in similar sizes in a given area. This may be a result of the fossils being "sorted" into windrows as they were being deposited in shallow waters by storms and wave action. The Eurypterus body is broadly divided into two parts:

3388-464: Is often covered with small outgrowths known as ornamentation. They include pustules (small protrusions), scales , and striations. They vary by species and are used for identification. For more detailed diagnostic descriptions of each species under Eurypterus , see sections below . The genus Eurypterus belongs to the family Eurypteridae . They are classified under the superfamily Eurypteroidea , suborder Eurypterina , order Eurypterida , and

3509-460: Is somewhat arbitrary. Although all species within a genus are supposed to be "similar", there are no objective criteria for grouping species into genera. There is much debate among zoologists about whether enormous, species-rich genera should be maintained, as it is extremely difficult to come up with identification keys or even character sets that distinguish all species. Hence, many taxonomists argue in favor of breaking down large genera. For instance,

3630-474: Is the type species , and the generic name is permanently associated with the type specimen of its type species. Should the specimen turn out to be assignable to another genus, the generic name linked to it becomes a junior synonym and the remaining taxa in the former genus need to be reassessed. In zoological usage, taxonomic names, including those of genera, are classified as "available" or "unavailable". Available names are those published in accordance with

3751-420: Is the most leg-like of all appendages, longer than the first three pairs and are mostly spineless except at the tipmost segments. The last pair (Appendage VI) are two broad paddle-like legs used for swimming. The coxae of Appendage VI are broad and flat, resembling an 'ear'. The ophisthosoma (the abdomen ) is composed of 12 segments, each consisting of a fused upper plate (tergite) and bottom plate (sternite). It

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3872-515: Is tied for 13th, the University of Texas School of Law is 15th, the Lyndon B. Johnson School of Public Affairs is 7th, and the McCombs School of Business is tied for 16th-best (with the undergraduate business program tied for 5th-best in the country). The University of Texas School of Architecture was ranked second among national undergraduate programs in 2012. A 2005 Bloomberg survey ranked

3993-543: The Blanton Museum of Art , and operates various auxiliary research facilities, such as the J. J. Pickle Research Campus and the McDonald Observatory . UT Austin's athletics constitute the Texas Longhorns . The Longhorns have won four NCAA Division I National Football Championships, six NCAA Division I National Baseball Championships, thirteen NCAA Division I National Men's Swimming and Diving Championships, and

4114-495: The Freshman Research Initiative and Texas Interdisciplinary Plan. The University of Texas at Austin encourages applicants to submit SAT / ACT scores, but it is not required. However, for students applying for admission from fall 2025 onwards, submission of SAT / ACT scores is mandatory as part of their undergraduate admission application. As of 2011, the university was one of the most selective universities in

4235-621: The International Code of Zoological Nomenclature ; the earliest such name for any taxon (for example, a genus) should then be selected as the " valid " (i.e., current or accepted) name for the taxon in question. Consequently, there will be more available names than valid names at any point in time; which names are currently in use depending on the judgement of taxonomists in either combining taxa described under multiple names, or splitting taxa which may bring available names previously treated as synonyms back into use. "Unavailable" names in zoology comprise names that either were not published according to

4356-799: The International Plant Names Index for plants in general, and ferns through angiosperms, respectively, and Nomenclator Zoologicus and the Index to Organism Names for zoological names. Totals for both "all names" and estimates for "accepted names" as held in the Interim Register of Marine and Nonmarine Genera (IRMNG) are broken down further in the publication by Rees et al., 2020 cited above. The accepted names estimates are as follows, broken down by kingdom: The cited ranges of uncertainty arise because IRMNG lists "uncertain" names (not researched therein) in addition to known "accepted" names;

4477-494: The University of North Carolina , the University of Vermont , and the University of Virginia . The Accounting and Latin American History programs are consistently ranked top in the nation by the U.S. News & World Report college rankings, most recently in their 2023 and 2021 editions, respectively. More than 50 other science, humanities, and professional programs rank in the top 25 nationally. The College of Pharmacy

4598-492: The University of Texas System . With 52,384 students as of fall 2022, it is also the largest institution in the system. The university is a major center for academic research, with research expenditures totaling $ 1.06 billion for the 2023 fiscal year. It joined the Association of American Universities in 1929. The university houses seven museums and seventeen libraries, including the Lyndon B. Johnson Presidential Library and

4719-502: The chelicerae , small pincer -like arms used for tearing food apart ( mastication ) during feeding. After the chelicerae are three pairs of short legs (Appendages II, III, and IV). They are spiniferous , with predominantly two spines on each podomere and with the tipmost segment having a single spine. The last two segments are often indistinguishable and give the appearance of a single segment having three spines. They are used both for walking and for food capture. The next pair (Appendage V)

4840-404: The platypus belongs to the genus Ornithorhynchus although George Shaw named it Platypus in 1799 (these two names are thus synonyms ) . However, the name Platypus had already been given to a group of ambrosia beetles by Johann Friedrich Wilhelm Herbst in 1793. A name that means two different things is a homonym . Since beetles and platypuses are both members of the kingdom Animalia,

4961-468: The prosoma and the opisthosoma (in turn divided into the mesosoma and the metasoma ). The prosoma is the forward part of the body, it is actually composed of six segments fused together to form the head and the thorax . It contains the semicircular to subrectangular platelike carapace . On the dorsal side of the latter are two large crescent-shaped compound eyes . They also possessed two smaller light-sensitive simple eyes (the median ocelli ) near

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5082-423: The subphylum Chelicerata . Until recently, eurypterids were thought to belong to the class Merostomata along with order Xiphosura . It is now believed that eurypterids are a sister group to Arachnida , closer to scorpions and spiders than to horseshoe crabs . Eurypterus was the first recognized taxon of eurypterids and is the most common. As a consequence, nearly every remotely similar eurypterid in

5203-420: The 19th century was classified under the genus (except for the distinctive members of the family Pterygotidae and Stylonuridae ). The genus was eventually split into several genera as the science of taxonomy developed. In 1958, several species distinguishable by closer placed eyes and spines on their swimming legs were split off into the separate genus Erieopterus by Erik Kjellesvig-Waering. Another split

5324-605: The 2009–2010 academic year, the university awarded a total of 13,215 degrees: 67.7% bachelor's degrees , 22.0% master's degrees, 6.4% doctoral degrees , and 3.9% Professional degrees. In addition, the university has nine honors programs , eight of which span a variety of academic fields: Liberal Arts Honors, the Business Honors Program, the Turing Scholars Program in Computer Science, Engineering Honors,

5445-420: The 2020–2021 academic year, 79 freshman students were National Merit Scholars . The University of Texas at Austin (UT Austin) was ranked 32nd among all universities in the U.S. and 9th among public universities according to U.S. News & World Report ' s 2024 rankings. Internationally, UT Austin was tied for 56th in the 2024 "Best Global Universities" ranking by U.S. News & World Report , 45th in

5566-559: The 423.5 acres (171.4 ha) for the Main Campus in central Austin and the J. J. Pickle Research Campus in north Austin and the other properties throughout Texas. The main campus has 150 buildings totaling over 18,000,000 square feet (1,700,000 m ). One of the university's most visible features is the Beaux-Arts Main Building , including a 307-foot (94 m) tower designed by Paul Philippe Cret . Completed in 1937,

5687-905: The Dean's Scholars Program in Natural Sciences, the Health Science Scholars Program in Natural Sciences, the Polymathic Scholars Program in Natural Sciences, and the Undergraduate Nursing Honors Program in School of Nursing. The ninth is the Plan II Honors Program, a rigorous interdisciplinary program that is a major in and of itself. Many Plan II students pursue a second major, often participating in another department's honors program in addition to Plan II. The university also offers programs such as

5808-469: The French botanist Joseph Pitton de Tournefort (1656–1708) is considered "the founder of the modern concept of genera". The scientific name (or the scientific epithet) of a genus is also called the generic name ; in modern style guides and science, it is always capitalised. It plays a fundamental role in binomial nomenclature , the system of naming organisms , where it is combined with the scientific name of

5929-599: The Internet. The university uses CapMetro to provide bus transportation for students around the campus on the UT Shuttle system and throughout Austin, and UT students, faculty, and staff with an active UT ID card are able to ride public transportation without paying a fare. The university contains eighteen colleges and schools and one academic unit, each listed with its founding date: The University of Texas at Austin offers more than 100 undergraduate and 170 graduate degrees. In

6050-479: The Main Building is in the middle of campus. The tower usually appears illuminated in white light in the evening but is lit burnt orange for various special occasions, including athletic victories and academic accomplishments; conversely, it is darkened for solemn occasions. At the top of the tower is a carillon of 56 bells, the largest in Texas. Songs are played on weekdays by student carillonneurs, in addition to

6171-481: The Office of Technology Commercialization, a technology transfer center which serves as the bridge between laboratory research and commercial development. In 2009, the university created nine new start-up companies to commercialize technology developed at the university and has created 46 start-ups in the past seven years. License agreements generated $ 10.9 million in revenue for the university in 2009. In January 2020,

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6292-570: The SAT and ACT standardized exams were "a proven differentiator that is in each student's and the University's best interest." On April 2, 2024, the University of Texas at Austin announced additional adjustments in compliance with Senate Bill 17, particularly in response to a letter from March 26, 2024 from Texas State Senator Brandon Creighton , which led to the layoff of approximately 60 individuals, most of whom formerly worked in DEI-related programs, and

6413-541: The Swedish paleontologist Gerhard Holm separated these fossils from the bedrock with acids . Holm was then able to examine the almost perfectly preserved fragments under a microscope. His remarkable study led to the modern breakthrough on eurypterid morphology . More fossils were recovered in great abundance in New York in the 19th century, and elsewhere in eastern Eurasia and North America . Today, Eurypterus remains one of

6534-701: The United States, and Latin America. The Perry–Castañeda Library , which houses the central University Libraries operations and the Perry–Castañeda Library Map Collection , is at the heart of campus. The Benson Latin American Collection holds the largest collection of Latin American materials among US university libraries, and maintains substantial digital collections. The University of Texas at Austin has an extensive tunnel system that links

6655-619: The University of Texas was inducted into the Association of American Universities . During World War II , the University of Texas was one of 131 colleges and universities nationally that took part in the V-12 Navy College Training Program which offered students a path to a Navy commission. Additionally, to facilitate the wartime effort, academic calendars were compressed, allowing for accelerated graduation. After Brown v. Board of Education in 1954, Houston, Texas, area teen Marion Ford had been accepted to become one of

6776-461: The ability to move its swimming appendages in both the horizontal and vertical plane. Eurypterus did not swim to hunt, rather they simply swam in order to move from one feeding site to another quickly. Most of the time they walked on the substrate with their legs (including their swimming leg). They were generalist species , equally likely to engage in predation or scavenging . They hunted small soft-bodied invertebrates like worms. They utilized

6897-419: The backward and down stroke, pushing the animal forward and lifting it up. The blades are then oriented horizontally on the recovery stroke to slash through the water without pushing the animal back. This type of swimming is exhibited by crabs and water beetles . An alternative hypothesis for Eurypterus swimming behavior is that individuals were capable of underwater flying (or subaqueous flight ), in which

7018-442: The base for higher taxonomic ranks, such as the family name Canidae ("Canids") based on Canis . However, this does not typically ascend more than one or two levels: the order to which dogs and wolves belong is Carnivora ("Carnivores"). The numbers of either accepted, or all published genus names is not known precisely; Rees et al., 2020 estimate that approximately 310,000 accepted names (valid taxa) may exist, out of

7139-405: The buildings on campus. Constructed c.  1928 under the supervision of UT engineering professor Carl J. Eckhardt Jr., then head of the physical plant, the tunnels have grown along with the campus. They measure approximately six miles in length. The tunnel system is used for communications and utility service. It is closed to the public and guarded by silent alarms . Since the late 1940s,

7260-516: The center of the carapace on a small elevation (known as the ocellar mound). Underneath the carapace is the mouth and six appendages , usually referred to in Roman numerals I-VI. Each appendage in turn is composed of nine segments (known as podomeres) labeled in Arabic numerals 1–9. The first segments which connect the appendages to the body are known as the coxa (plural coxae). The first pair (Appendage I) are

7381-454: The closure on April 2, 2024, leading the charter school to be moved to the College of Education . On February 4, 2024, a Palestinian-American student at a pro-Palestinian protest at the campus was stabbed, receiving non-life-threatening injuries. The attacker used a racial slur against the protestors and the attack was investigated as a hate crime. A month later the attacker was indicted by

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7502-429: The confirmed arrest of 57 protesters, including a photojournalist for Fox 7 Austin, with several more detained. Charges were then dismissed against 46 protesters the next day, leading to their subsequent release, with the charges against the remaining 11 protesters dropped on April 26, 2024. This decision received sharp backlash, including from general faculty, staff, students, several Democratic legislators for

7623-588: The eastern side of the main campus, the Lyndon Baines Johnson Library and Museum is one of 13 presidential libraries administered by the National Archives and Records Administration . A statue of Martin Luther King Jr. was unveiled on campus in 1999 and subsequently vandalized. By 2004, John Butler, a professor at the McCombs School of Business suggested moving it to Morehouse College ,

7744-498: The elimination of the newly-renamed Division of Campus and Community Engagement. Students, faculty, staff, and outside critics denounced the university's over-compliance with the anti-DEI law, since the university had already been compliant since January 1, 2024. At a UT Austin Faculty Council meeting on April 15, 2024, in response to mounting criticism, President Jay Hartzell stated the additional changes were made in response to

7865-417: The epimera with the exception of the last needle-like (styliform) part of the body known as the telson. The segment immediately preceding the telson (which also has the largest epimera of the postabdomen ) is known as the pretelson. An alternative way to divide the ophisthosoma is by function. It can also be divided into the mesosoma (segments 1 to 6), and the metasoma (segments 7 to 12). The mesosoma contains

7986-492: The fall 2021 semester, implementing safety protocols like testing requirements and vaccination incentives to ensure a safe return amid the ongoing pandemic. In 2024, after four years of test-optional admissions for undergraduate applications due to the COVID-19 pandemic, standardized testing scores were once again made a mandatory part of admissions, beginning with applications for the fall 2025 semester. Jay Hartzell commented that

8107-605: The first Black attendees. In an interview with a reporter he announced his desire to try-out for the football team. The Ford Crisis would begin and all Black admissions at the time were rescinded until policy could be drawn up. In the fall of 1956, the first Black students entered the university's undergraduate class. Black students were permitted to live in campus dorms, but were barred from campus cafeterias. The University of Texas integrated its facilities and desegregated its dormitories in 1965. UT, which had had an open admissions policy, adopted standardized testing for admissions in

8228-446: The form "author, year" in zoology, and "standard abbreviated author name" in botany. Thus in the examples above, the genus Canis would be cited in full as " Canis Linnaeus, 1758" (zoological usage), while Hibiscus , also first established by Linnaeus but in 1753, is simply " Hibiscus L." (botanical usage). Each genus should have a designated type , although in practice there is a backlog of older names without one. In zoology, this

8349-426: The former term is preferred). They are unique to eurypterids. Eurypterus are sexually dimorphic . On the bottom side of the first two segments of the mesosoma are central appendages used for reproduction. In females, they are long and narrow. In the males they are very short. A minority of authors, however, assume the reverse: longer genital appendage for males, shorter for females. The exoskeleton of Eurypterus

8470-450: The fossil correctly as an arthropod . He named it Eurypterus remipes and established the genus Eurypterus in the process. The name means 'wide wing' or 'broad paddle', referring to the swimming legs, from Greek εὐρύς ( eurús 'wide') and πτερόν ( pteron 'wing'). However, De Kay thought Eurypterus was a branchiopod (a group of crustaceans which include fairy shrimps and water fleas ). Soon after, Eurypterus lacustris

8591-727: The generic name (or its abbreviated form) still forms the leading portion of the scientific name, for example, Canis lupus lupus for the Eurasian wolf subspecies, or as a botanical example, Hibiscus arnottianus ssp. immaculatus . Also, as visible in the above examples, the Latinised portions of the scientific names of genera and their included species (and infraspecies, where applicable) are, by convention, written in italics . The scientific names of virus species are descriptive, not binomial in form, and may or may not incorporate an indication of their containing genus; for example,

8712-531: The genus Eurypterus , the most common of which is E. remipes , the first eurypterid fossil discovered and the state fossil of New York . Members of Eurypterus averaged at about 13 to 23 cm (5 to 9 in) in length, but the largest individual discovered was estimated to be 60 cm (24 in) long. They all possessed spine-bearing appendages and a large paddle they used for swimming. They were generalist species , equally likely to engage in predation or scavenging . The first fossil of Eurypterus

8833-402: The genus, their diagnostic descriptions, synonyms (if present), and distribution are as follows: Eurypterus De Kay, 1825 The list does not include the large number of fossils previously classified under Eurypterus . Most of them are now reclassified to other genera, identified as other animals (like crustaceans ) or pseudofossils , or remains of doubtful placement. Classification

8954-562: The gills and reproductive organs of Eurypterus . Its ventral segments are overlaid by appendage-derived plates known as Blattfüsse (singular Blattfuss, German for "sheet foot"). Protected within which are the branchial chambers which contain the respiratory organs of Eurypterus . The metasoma, meanwhile, do not possess Blattfüsse. Some authors incorrectly use mesosoma and preabdomen interchangeably, as with metasoma and postabdomen. The main respiratory organs of Eurypterus were what seems to be book gills , located in branchial chambers within

9075-432: The idea that a newly defined genus should fulfill these three criteria to be descriptively useful: Moreover, genera should be composed of phylogenetic units of the same kind as other (analogous) genera. The term "genus" comes from Latin genus , a noun form cognate with gignere ('to bear; to give birth to'). The Swedish taxonomist Carl Linnaeus popularized its use in his 1753 Species Plantarum , but

9196-628: The largest component, with 23,236 ± 5,379 accepted genus names, of which 20,845 ± 4,494 are angiosperms (superclass Angiospermae). By comparison, the 2018 annual edition of the Catalogue of Life (estimated >90% complete, for extant species in the main) contains currently 175,363 "accepted" genus names for 1,744,204 living and 59,284 extinct species, also including genus names only (no species) for some groups. The number of species in genera varies considerably among taxonomic groups. For instance, among (non-avian) reptiles , which have about 1180 genera,

9317-684: The legislature appropriated $ 1.35 million for the purchase of land next to the main campus. However, expansion was hampered by the restriction against using state revenues to fund construction of university buildings as set forth in Article 7, Section 14 of the Constitution. With the completion of Santa Rita No. 1 well and the discovery of oil on university-owned lands in 1923, the university added significantly to its Permanent University Fund. The additional income from Permanent University Fund investments allowed for bond issues in 1931 and 1947, which allowed

9438-645: The legislature to address funding for the university along with the Agricultural and Mechanical College (now known as Texas A&M University ). With sufficient funds to finance construction on both campuses, on April 8, 1931, the Forty Second Legislature passed H.B. 368. which dedicated the Agricultural and Mechanical College a 1/3 interest in the Available University Fund, the annual income from Permanent University Fund investments. In 1929,

9559-502: The lizard genus Anolis has been suggested to be broken down into 8 or so different genera which would bring its ~400 species to smaller, more manageable subsets. University of Texas at Austin The University of Texas at Austin ( UT Austin , UT , or Texas ) is a public research university in Austin, Texas , United States. Founded in 1883, it is the flagship institution of

9680-735: The mandate to establish "The University of Texas" by popular vote. On March 30, 1881, the Texas legislature organized the structure of the university and called for a popular vote to determine its location. Austin was chosen as the site with 30,913 votes, while Galveston was designated for the medical department. On November 17, 1882, the cornerstone of the Old Main building was laid at the original "College Hill" location, and University President Ashbel Smith expressed optimism about Texas's untapped resources. The University of Texas officially opened its doors on September 15, 1883. The old Main Building of

9801-435: The mass of spines on their front appendages to both kill and hold them while they used their chelicerae to rip off pieces small enough to swallow. Young individuals may also have fallen prey to cannibalism by larger adults. Eurypterus were most probably marine animals, as their remains are mostly found in intertidal shallow environments. The concentrations of Eurypterus fossils in certain sites has been interpreted to be

9922-454: The mid-1950s, at least in part as a conscious strategy to minimize the number of Black undergraduates, given that they were no longer able to simply bar their entry after the Brown decision Following growth in enrollment after World War II, the university unveiled an ambitious master plan in 1960 designed for "10 years of growth" that was intended to "boost the University of Texas into the ranks of

10043-423: The middle 50% ranged from 26 to 31. In terms of class rank, 74.4% of enrolled freshmen were in the top 10% of their high school classes and 91.7% ranked in the top quarter. For fall 2019, 53,525 undergraduate students applied, 17,029 undergraduate students were admitted, and 8,170 undergraduate students enrolled in the university full or part time, making the acceptance rate 31.8% and enrollment rate 48% overall. In

10164-403: The most (>300) have only 1 species, ~360 have between 2 and 4 species, 260 have 5–10 species, ~200 have 11–50 species, and only 27 genera have more than 50 species. However, some insect genera such as the bee genera Lasioglossum and Andrena have over 1000 species each. The largest flowering plant genus, Astragalus , contains over 3,000 species. Which species are assigned to a genus

10285-468: The most commonly found and best known eurypterid genera, comprising more than 95% of all known eurypterid fossils. E. remipes was designated the New York State Fossil by the then Governor Mario Cuomo in 1984. The largest arthropods to have ever existed were eurypterids. The largest known species ( Jaekelopterus rhenaniae ) reached up to 2.5 m (8.2 ft) in length, about the size of

10406-428: The name could not be used for both. Johann Friedrich Blumenbach published the replacement name Ornithorhynchus in 1800. However, a genus in one kingdom is allowed to bear a scientific name that is in use as a generic name (or the name of a taxon in another rank) in a kingdom that is governed by a different nomenclature code. Names with the same form but applying to different taxa are called "homonyms". Although this

10527-454: The nation, behind only Georgia Tech . A 2013 College Database study found that UT Austin was 22nd in the nation in terms of increased lifetime earnings by graduates. UT Austin is classified among "R1: Doctoral Universities – Very high research activity." For the 2014–2015 cycle, the university was awarded over $ 580 million in sponsored projects, and has earned more than 300 patents since 2003. The University of Texas at Austin houses

10648-460: The observation deck in the tower of the Main Building. Armed with multiple firearms, he killed 14 people on campus, 11 from the observation deck and below the clocks on the tower, and three more in the tower, as well as wounding two others inside the observation deck. The massacre ended when Whitman was shot and killed by police after they breached the tower. After the Whitman event, the observation deck

10769-526: The provisions of the ICZN Code, e.g., incorrect original or subsequent spellings, names published only in a thesis, and generic names published after 1930 with no type species indicated. According to "Glossary" section of the zoological Code, suppressed names (per published "Opinions" of the International Commission of Zoological Nomenclature) remain available but cannot be used as the valid name for

10890-483: The region, and First Amendment advocacy groups, including an official statement from the UT Faculty Council Executive Committee denouncing it, in part due to the extreme, chaotic, and violent police response that ensued and alleged violations of First Amendment rights. The university additionally set new rules for protests on campus, such as banning masks and face coverings and instituting

11011-501: The region. Relative to other universities in the state of Texas, UT Austin was second to Rice University in selectivity according to a Business Journal study weighing acceptance rates and the mid-range of the SAT and ACT. The University of Texas at Austin was ranked as the 18th most selective in the South. As a state public university, UT Austin was subject to Texas House Bill 588 , which guaranteed Texas high school seniors graduating in

11132-426: The school 5th among all business schools and first among public business schools for the largest number of alumni who are S&P 500 CEOs. Similarly, a 2005 USA Today report ranked the university as "the number one source of new Fortune 1000 CEOs". A "payback" analysis published by SmartMoney in 2011 comparing graduates' salaries to tuition costs concluded the school was the second-best value of all colleges in

11253-550: The school has claimed more titles in men's and women's sports than any other member in the Big 12 . As of 2020, 13 Nobel Prize winners, 25 Pulitzer Prize winners, three Turing Award winners, two Fields Medal recipients, two Wolf Prize winners, and three Abel Prize winners have been affiliated with the school as alumni, faculty members, or researchers. The university has also been affiliated with three Primetime Emmy Award winners, and as of 2021, its students and alumni have earned

11374-475: The segments of the mesosoma. They may have been used for underwater respiration. They are composed of several layers of thin tissue stacked in such a way as to resemble the pages of a book, hence the name. In addition, they also possessed five pairs of oval-shaped areas covered with microscopic projections on the ceiling of the second branchial chambers within the mesosoma, immediately below the gill tracts. These areas are known as Kiemenplatten (or gill-tracts, though

11495-422: The sinuous motions and shape of the paddles themselves acting as hydrofoils are enough to generate lift . This type is similar to that found in sea turtles and sea lions . It has a relatively slower acceleration rate than the rowing type, especially since adults have proportionally smaller paddles than juveniles. But since the larger sizes of adults mean a higher drag coefficient , using this type of propulsion

11616-450: The sixth floor, before killing himself. No one else was injured, except for one sprained ankle suffered by a female student fleeing the scene. In early 2020, following a major outbreak of the new coronavirus , the university restricted travel to Wuhan province in China, aligning with the U.S. Department of State's recommendation. By March 17, 2020, then-UT President Gregory L. Fenves announced

11737-492: The southeast, in hopes of using the land to relocate the university's intramural fields, baseball field, tennis courts, and parking lots. On March 6, 1967, the Sixtieth Texas Legislature changed the university's official name from "The University of Texas" to "The University of Texas at Austin" to reflect the growth of the University of Texas System . On August 1, 1966, Texas student Charles Whitman barricaded

11858-497: The specific name particular to the wolf. A botanical example would be Hibiscus arnottianus , a particular species of the genus Hibiscus native to Hawaii. The specific name is written in lower-case and may be followed by subspecies names in zoology or a variety of infraspecific names in botany . When the generic name is already known from context, it may be shortened to its initial letter, for example, C. lupus in place of Canis lupus . Where species are further subdivided,

11979-412: The standard format for a species name comprises the generic name, indicating the genus to which the species belongs, followed by the specific epithet, which (within that genus) is unique to the species. For example, the gray wolf 's scientific name is Canis lupus , with Canis ( Latin for 'dog') being the generic name shared by the wolf's close relatives and lupus (Latin for 'wolf') being

12100-805: The student organization that organized the protests, the Palestine Solidarity Committee. Travis County Attorney Delia Garza stated that the way that the university handled the protests put a strain on the local criminal justice system, specifically reprimanding the sending of protestors to jail for low-level charges. A report later released by the UT Austin Committee of Counsel on Academic Freedom and Responsibility (CCAFR) on July 17, 2024 found that UT Austin administrators violated its own institutional rules in clear disregard of freedom of speech and expression protections. The university's property totals 1,438.5 acres (582.1 ha), comprising

12221-403: The taxon is termed a synonym ; some authors also include unavailable names in lists of synonyms as well as available names, such as misspellings, names previously published without fulfilling all of the requirements of the relevant nomenclatural code, and rejected or suppressed names. A particular genus name may have zero to many synonyms, the latter case generally if the genus has been known for

12342-489: The threats from the Republican -led State Legislature and the University of Texas System Board of Regents, and to restore "confidence" in the university, reacting to changing tides in public opinion towards higher education amongst Republicans. The university's Division of Campus and Community Engagement operated the University of Texas-University Charter School , a charter school system with 23 campuses across Texas, until

12463-410: The top 10% of their class admission to any public Texas university. A new state law granting UT Austin (but no other state university) a partial exemption from the top 10% rule, Senate Bill 175, was passed by the 81st Legislature in 2009. It modified this admissions policy by limiting automatically admitted freshmen to 75% of the entering in-state freshman class, starting in 2011. The university will admit

12584-517: The top one percent, the top two percent and so forth until the cap is reached; the university currently admits the top 6 percent. Furthermore, students admitted under Texas House Bill 588 are not guaranteed their choice of college or major, but rather only guaranteed admission to the university as a whole. Many colleges, such as the Cockrell School of Engineering, have secondary requirements that must be met for admission. For others who go through

12705-577: The top state universities in the nation." In 1965, the Texas Legislature granted the university Board of Regents to use eminent domain to purchase additional properties surrounding the original 40 acres (160,000 m ). The university began buying parcels of land to the north, south, and east of the existing campus, particularly in the Blackland neighborhood to the east and the Brackenridge tract to

12826-582: The traditional application process, selectivity is deemed "more selective" according to the Carnegie Foundation for the Advancement of Teaching and by U.S. News & World Report . For fall 2017, 51,033 applied and 18,620 were accepted (36.5%), and of those accepted, 45.2% enrolled. Among freshman students who enrolled in fall 2017, SAT scores for the middle 50% ranged from 570 to 690 for critical reading and 600–710 for math. ACT composite scores for

12947-465: The university broke ground on the $ 120 million Bill & Melinda Gates Computer Science Complex and Dell Computer Science Hall and the $ 51 million Belo Center for New Media, both of which are now complete. The new LEED gold-certified, 110,000-square-foot (10,000 m ) Student Activity Center (SAC) opened in January 2011, housing study rooms, lounges and food vendors. The SAC was constructed as

13068-489: The university has generated its own electricity. Today its natural gas cogeneration plant has a capacity of 123 MW. The university also operates a TRIGA nuclear reactor at the J. J. Pickle Research Campus . The university continues to expand its facilities on campus. In 2010, the university opened the state-of-the-art Norman Hackerman building (on the site of the former Experimental Sciences Building) housing chemistry and biology research and teaching laboratories. In 2010,

13189-419: The university was built in a Victorian - Gothic style and served as the central point of the campus's 40-acre (16 ha) site, and was used for nearly all purposes. But by the 1930s, discussions arose about the need for new library space, and the Main Building was razed in 1934, despite the objections of many students and faculty. The modern-day tower and Main Building were constructed in its place. In 1916,

13310-534: The university's Harry Ransom Humanities Research Center include one of only 21 remaining complete copies of the Gutenberg Bible and the first permanent photograph, View from the Window at Le Gras , taken by Nicéphore Niépce . The newest museum, the 155,000-square-foot (14,400 m ) Blanton Museum of Art , is the largest university art museum in the United States and hosts approximately 17,000 works from Europe,

13431-585: The university, under the explicit direction of President Hartzell, requested the assistance of the Austin Police Department (APD) and the Texas Department of Public Safety (DPS) , in coordination with Texas Governor Greg Abbott , in an attempt to quell said protests and an "occupation" of the university, in contrast to free speech on campus laws praised by Abbott and the university in prior years. The deployment of multiple police units led to

13552-508: The university. Also in 2008, Darrell K Royal-Texas Memorial Stadium was expanded to a seating capacity of 100,119, making it the largest stadium (by capacity) in the state of Texas at the time. On Tuesday, September 28, 2010, a shooting occurred at the Perry–Castañeda Library (PCL) where student Colton Tooley, armed with an AK-47, fired shots on his walk from Guadalupe Street to the library's front entrance. The student ascended to

13673-410: The usual pealing of Westminster Quarters every quarter-hour between 6 a.m. and 9 p.m. In 1998, after the installation of security and safety measures, the observation deck reopened to the public indefinitely for weekend tours. The university's seven museums and seventeen libraries hold over nine million volumes, making it the seventh-largest academic library in the country. The holdings of

13794-566: The values quoted are the mean of "accepted" names alone (all "uncertain" names treated as unaccepted) and "accepted + uncertain" names (all "uncertain" names treated as accepted), with the associated range of uncertainty indicating these two extremes. Within Animalia, the largest phylum is Arthropoda , with 151,697 ± 33,160 accepted genus names, of which 114,387 ± 27,654 are insects (class Insecta). Within Plantae, Tracheophyta (vascular plants) make up

13915-422: The vast majority of fossils found in such sites are molts and not of actual animals. The same behavior can be seen in modern horseshoe crabs. Genus The composition of a genus is determined by taxonomists . The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including

14036-429: The virus species " Salmonid herpesvirus 1 ", " Salmonid herpesvirus 2 " and " Salmonid herpesvirus 3 " are all within the genus Salmonivirus ; however, the genus to which the species with the formal names " Everglades virus " and " Ross River virus " are assigned is Alphavirus . As with scientific names at other ranks, in all groups other than viruses, names of genera may be cited with their authorities, typically in

14157-509: The world by Academic Ranking of World Universities (ARWU) in 2024, 52nd worldwide by Times Higher Education World University Rankings (2024), and 66th globally by QS World University Rankings (2024). UT Austin was also ranked 35th in the world by the Center for World University Rankings (CWUR) in 2024. The University of Texas at Austin is considered to be a " Public Ivy "—a public university that provides an Ivy League collegiate experience at

14278-461: Was also discovered in New York in 1835 by the paleontologist Richard Harlan . Another species was discovered in Estonia in 1858 by Jan Nieszkowski . He considered it to be of the same species as the first discovery ( E. remipes ); it is now known as E. tetragonophthalmus . These specimens from Estonia are often of extraordinary quality, retaining the actual cuticle of their exoskeletons. In 1898,

14399-528: Was closed until 1968 and then closed again in 1975 following a series of suicide jumps during the 1970s. In 1999, after installation of security fencing and other safety precautions, the tower observation deck reopened to the public. There is a turtle pond park near the tower dedicated to those affected by the tragedy. The first presidential library on a university campus was dedicated on May 22, 1971, with former President Johnson , Lady Bird Johnson and then-President Richard Nixon in attendance. Constructed on

14520-485: Was found in 1818 by S. L. Mitchill, a fossil collector. It was recovered from the Bertie Formation of New York (near Westmoreland, Oneida County ). Mitchill interpreted the appendages on the carapace as barbels arising from the mouth. He consequently identified the fossil as a catfish of the genus Silurus . It was only after seven years, in 1825, that the American zoologist James Ellsworth De Kay identified

14641-444: Was proposed by Leif Størmer in 1973 when he reclassified some Eurypterus to Baltoeurypterus based on the size of some of the last segments of their swimming legs. O. Erik Tetlie in 2006 deemed these differences too insignificant to justify a separate genus. He merged Baltoeurypterus back into Eurypterus . It is now believed that the minor variations described by Størmer are simply the differences found in adults and juveniles within

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