Misplaced Pages

#927072

40-999: In a conference of the Ministers of Forests of Central African Forest Commission (COMIFAC), it had been resolved to establish within the Congo Basin , the Sangha River Tri-national Protected area (STN) encompassing the Dzanga Sangha Special Reserve in the Central African Republic, which incorporates the Nouabalé-Ndoki National Park in the Republic of Congo ( Brazzaville ) and the Lobéké National Park in Cameroon . Already in 1991,

80-555: A clade ( monophyletic group) including birds, though the precise definition of this clade varies between authors. Others prioritize the clade Sauropsida , which typically refers to all amniotes more closely related to modern reptiles than to mammals . The earliest known proto-reptiles originated from the Carboniferous period, having evolved from advanced reptiliomorph tetrapods which became increasingly adapted to life on dry land. The earliest known eureptile ("true reptile")

120-447: A temnospondyl ). A series of footprints from the fossil strata of Nova Scotia dated to 315  Ma show typical reptilian toes and imprints of scales. These tracks are attributed to Hylonomus , the oldest unquestionable reptile known. It was a small, lizard-like animal, about 20 to 30 centimetres (7.9 to 11.8 in) long, with numerous sharp teeth indicating an insectivorous diet. Other examples include Westlothiana (for

160-490: A section of the clade Amniota : The section that is left after the Mammalia and Aves have been hived off. It cannot be defined by synapomorphies , as is the proper way. Instead, it is defined by a combination of the features it has and the features it lacks: reptiles are the amniotes that lack fur or feathers. At best, the cladists suggest, we could say that the traditional Reptilia are 'non-avian, non-mammalian amniotes'. Despite

200-565: A tiny gecko, Sphaerodactylus ariasae , which can grow up to 17 mm (0.7 in) to the saltwater crocodile , Crocodylus porosus , which can reach over 6 m (19.7 ft) in length and weigh over 1,000 kg (2,200 lb). In the 13th century, the category of reptile was recognized in Europe as consisting of a miscellany of egg-laying creatures, including "snakes, various fantastic monsters, lizards, assorted amphibians, and worms", as recorded by Beauvais in his Mirror of Nature . In

240-526: Is a major problem and every year thousands of African gray parrots are caught and exported illegally. Even in 1997, when the government placed a ban on the export of birds, many birds were still caught and sold illegally for traditional medicine and other reasons. Mineral deposits have not been ruled out. A growing local population is dependent upon local resources. Central African Forest Commission The Central African Forest Commission ( French : Commission des Forêts d'Afrique Centrale , or COMIFAC )

280-504: Is an Important Bird Area (#CM033). Over three hundred species of birds have been recorded here. The African green pigeon , hornbills , yellow-throated cuckoo , sandy scops owl and the chocolate-backed kingfisher can all be found in the park. Specifically within Cameroon and Gabon , it is an important bird area for the Dja River scrub warbler . Due to Lobéké' proximity to Congo and CAR,

320-563: Is an intergovernmental organisation in Central Africa. Its goal is to manage the forests of Central Africa in a sustainable manner and is supported by the wildlife trade monitoring network TRAFFIC. The secretariat is based in Yaoundé , Cameroon . Raymond Mbitikon serves as its Executive Secretary. Its four official languages are French, English, Spanish and Portuguese. The Central African Forest Commission's eleven member states are: COMIFAC

360-520: Is characterized by an enormous variety of plants. Dominant species include Malvaceae ( Triplochiton scleroxylon , Pterygota , Ceiba pentandra ) and Terminalia superba . The understory consists of Marantaceae - Zingiberaceae thicket, or Ebenaceae and Annonaceae trees. Near streams there are clusters of Gilbertiodendron dewevrei . Palm thickets and sedge marshes border the savannas. There are more than 300 species of trees in Lobéké. Some of

400-479: Is equivalent to the more common definition of Sauropsida, which Modesto and Anderson synonymized with Reptilia, since the latter is better known and more frequently used. Unlike most previous definitions of Reptilia, however, Modesto and Anderson's definition includes birds, as they are within the clade that includes both lizards and crocodiles. General classification of extinct and living reptiles, focusing on major groups. The cladogram presented here illustrates

440-492: Is why the tri-national environmental initiative with the park and Dzanga-Sangha Forest Reserve and the Nouabalé-Ndoki National Park was made. The park covers 1,838.55 km (709.87 sq mi), and its altitude ranges from 300 m (980 ft) to 750 m (2,460 ft) above sea level . More than twelve natural savannas, characterized as saline swamps, occur within the park. There are also sandbars on

SECTION 10

#1732855526928

480-868: The Central African Republic and the Nouabalé-Ndoki National Park in the Republic of Congo . This tri-park area, called the Sangha Trinational is operated by the Central African Forest Commission (COMIFAC), and is overlooked and funded by international wildlife groups such as the World Wildlife Fund , the German Cooperation of Technical Collaboration (GTZ) and the Wildlife Conservation Society (WCS). In 2012,

520-853: The Reptile Database . The study of the traditional reptile orders, customarily in combination with the study of modern amphibians , is called herpetology . Reptiles have been subject to several conflicting taxonomic definitions. In Linnaean taxonomy , reptiles are gathered together under the class Reptilia ( / r ɛ p ˈ t ɪ l i ə / rep- TIL -ee-ə ), which corresponds to common usage. Modern cladistic taxonomy regards that group as paraphyletic , since genetic and paleontological evidence has determined that birds (class Aves), as members of Dinosauria , are more closely related to living crocodilians than to other reptiles, and are thus nested among reptiles from an evolutionary perspective. Many cladistic systems therefore redefine Reptilia as

560-418: The amniotic egg . The terms Sauropsida ("lizard faces") and Theropsida ("beast faces") were used again in 1916 by E.S. Goodrich to distinguish between lizards, birds, and their relatives on the one hand (Sauropsida) and mammals and their extinct relatives (Theropsida) on the other. Goodrich supported this division by the nature of the hearts and blood vessels in each group, and other features, such as

600-1733: The "family tree" of reptiles, and follows a simplified version of the relationships found by M.S. Lee, in 2013. All genetic studies have supported the hypothesis that turtles are diapsids; some have placed turtles within Archosauromorpha, though a few have recovered turtles as Lepidosauromorpha instead. The cladogram below used a combination of genetic (molecular) and fossil (morphological) data to obtain its results. Synapsida ( mammals and their extinct relatives) [REDACTED] † Millerettidae [REDACTED] † Eunotosaurus † Lanthanosuchidae [REDACTED] † Pareiasauromorpha [REDACTED] † Procolophonoidea [REDACTED] † Captorhinidae [REDACTED] † Paleothyris † Araeoscelidia [REDACTED] † Claudiosaurus [REDACTED] † Younginiformes [REDACTED] † Kuehneosauridae [REDACTED] Rhynchocephalia ( tuatara and their extinct relatives) [REDACTED] Squamata ( lizards and snakes ) [REDACTED] [REDACTED] † Eosauropterygia [REDACTED] † Placodontia [REDACTED] † Sinosaurosphargis † Odontochelys † Proganochelys Testudines ( turtles ) [REDACTED] † Choristodera [REDACTED] † Prolacertiformes [REDACTED] † Rhynchosauria [REDACTED] † Trilophosaurus [REDACTED] Archosauriformes ( crocodiles , birds , dinosaurs and extinct relatives) [REDACTED] [REDACTED] The placement of turtles has historically been highly variable. Classically, turtles were considered to be related to

640-453: The 18th century, the reptiles were, from the outset of classification, grouped with the amphibians . Linnaeus , working from species-poor Sweden , where the common adder and grass snake are often found hunting in water, included all reptiles and amphibians in class "III – Amphibia" in his Systema Naturæ . The terms reptile and amphibian were largely interchangeable, reptile (from Latin repere , 'to creep') being preferred by

680-480: The French. J.N. Laurenti was the first to formally use the term Reptilia for an expanded selection of reptiles and amphibians basically similar to that of Linnaeus. Today, the two groups are still commonly treated under the single heading herpetology . It was not until the beginning of the 19th century that it became clear that reptiles and amphibians are, in fact, quite different animals, and P.A. Latreille erected

720-627: The Sangha. The annual rainfall averages 1400 mm., with the dry season occurring from December through February. Large forest clearings, or bais, have soils rich in various minerals that attract the mega fauna of the forest. Lobéké is the home of many different ethnic groups including the Baka , the Bantu and the Bangando . Lobéké is predominantly a semi-evergreen forest, most of which has never been logged. The forest

760-464: The WWF had conducted a biological assessment of the area and recommended that the Lobéké area be protected, recommending that the unexploited 40,000 hectares be expanded to encompass over 400,000 hectares. In October 1999, the park was declared a National Park. In the same year the so-called Yaoundé Declaration was signed, forming a tri-national park agreement of cooperation with Dzanga-Sangha Forest Reserve in

800-701: The aim of informing policy-making and to promote better governance and sustainable management of natural resources. This article about a forestry agency is a stub . You can help Misplaced Pages by expanding it . Reptiles This is an accepted version of this page See text for extinct groups. Reptiles , as commonly defined, are a group of tetrapods with an ectothermic ('cold-blooded') metabolism and amniotic development . Living reptiles comprise four orders : Testudines ( turtles ), Crocodilia ( crocodilians ), Squamata ( lizards and snakes ), and Rhynchocephalia (the tuatara ). As of May 2023, about 12,000 living species of reptiles are listed in

840-657: The anapsid condition has been found to occur so variably among unrelated groups that it is not now considered a useful distinction. By the early 21st century, vertebrate paleontologists were beginning to adopt phylogenetic taxonomy, in which all groups are defined in such a way as to be monophyletic ; that is, groups which include all descendants of a particular ancestor. The reptiles as historically defined are paraphyletic , since they exclude both birds and mammals. These respectively evolved from dinosaurs and from early therapsids, both of which were traditionally called "reptiles". Birds are more closely related to crocodilians than

SECTION 20

#1732855526928

880-421: The class Batracia (1825) for the latter, dividing the tetrapods into the four familiar classes of reptiles, amphibians, birds, and mammals. The British anatomist T.H. Huxley made Latreille's definition popular and, together with Richard Owen , expanded Reptilia to include the various fossil " antediluvian monsters", including dinosaurs and the mammal-like ( synapsid ) Dicynodon he helped describe. This

920-554: The early proposals for replacing the paraphyletic Reptilia with a monophyletic Sauropsida , which includes birds, that term was never adopted widely or, when it was, was not applied consistently. When Sauropsida was used, it often had the same content or even the same definition as Reptilia. In 1988, Jacques Gauthier proposed a cladistic definition of Reptilia as a monophyletic node-based crown group containing turtles, lizards and snakes, crocodilians, and birds, their common ancestor and all its descendants. While Gauthier's definition

960-584: The entire Sangha Trinational protected area (including Lobéké National Park) became a World Heritage Site . Lobéké National Park belongs to the Moloundou arrondissement, located in the vicinity of Boumba-et-Ngoko . The Moloundou area has been described as "one of the richest rubber areas of Africa" and the Germans established a rubber making plant in the area. The park is located close to the borders with neighbouring Republic of Congo and Central African Republic, which

1000-453: The fetus develops within the mother, using a (non-mammalian) placenta rather than contained in an eggshell . As amniotes, reptile eggs are surrounded by membranes for protection and transport, which adapt them to reproduction on dry land. Many of the viviparous species feed their fetuses through various forms of placenta analogous to those of mammals , with some providing initial care for their hatchlings. Extant reptiles range in size from

1040-412: The highest densities of African forest elephants and western lowland gorillas in all of Africa are found in Lobéké. Other animals include chimpanzees , gorillas , leopards , as well as ten species of forest ungulates . In addition to mammals, the faunal inventory includes 215 species of butterflies, 134 species of fish, 18 species of reptiles , and 16 species of amphibians . Lobéké National Park

1080-460: The hypothesis that turtles belong to a separate clade within Sauropsida , outside the saurian clade altogether. The origin of the reptiles lies about 310–320 million years ago, in the steaming swamps of the late Carboniferous period, when the first reptiles evolved from advanced reptiliomorphs . The oldest known animal that may have been an amniote is Casineria (though it may have been

1120-508: The late 19th century, a number of definitions of Reptilia were offered. The biological traits listed by Lydekker in 1896, for example, include a single occipital condyle , a jaw joint formed by the quadrate and articular bones, and certain characteristics of the vertebrae . The animals singled out by these formulations, the amniotes other than the mammals and the birds, are still those considered reptiles today. The synapsid/sauropsid division supplemented another approach, one that split

1160-499: The latter are to the rest of extant reptiles. Colin Tudge wrote: Mammals are a clade , and therefore the cladists are happy to acknowledge the traditional taxon Mammalia ; and birds, too, are a clade, universally ascribed to the formal taxon Aves . Mammalia and Aves are, in fact, subclades within the grand clade of the Amniota. But the traditional class Reptilia is not a clade. It is just

1200-796: The living reptiles, there are many diverse groups that are now extinct , in some cases due to mass extinction events . In particular, the Cretaceous–Paleogene extinction event wiped out the pterosaurs , plesiosaurs , and all non-avian dinosaurs alongside many species of crocodyliforms and squamates (e.g., mosasaurs ). Modern non-bird reptiles inhabit all the continents except Antarctica. Reptiles are tetrapod vertebrates , creatures that either have four limbs or, like snakes, are descended from four-limbed ancestors. Unlike amphibians , reptiles do not have an aquatic larval stage. Most reptiles are oviparous , although several species of squamates are viviparous , as were some extinct aquatic clades  –

1240-422: The other euryapsids, and given the older name Parapsida. Parapsida was later discarded as a group for the most part (ichthyosaurs being classified as incertae sedis or with Euryapsida). However, four (or three if Euryapsida is merged into Diapsida) subclasses remained more or less universal for non-specialist work throughout the 20th century. It has largely been abandoned by recent researchers: In particular,

Lobéké National Park - Misplaced Pages Continue

1280-497: The park is part of a tri-national environmental initiative that includes the Dzanga Sangha Special Reserve of CAR and the Nouabalé-Ndoki National Park of the Republic of the Congo. Observation towers built 5 m (16 ft) above ground level support ecological monitoring and tourism. Timber exploitation and safari hunting are a concern, as well as poaching for bushmeat , exotic animals, and ivory. Illegal fishing or bird poaching

1320-416: The primitive anapsid reptiles. Molecular work has usually placed turtles within the diapsids. As of 2013, three turtle genomes have been sequenced. The results place turtles as a sister clade to the archosaurs , the group that includes crocodiles, non-avian dinosaurs, and birds. However, in their comparative analysis of the timing of organogenesis , Werneburg and Sánchez-Villagra (2009) found support for

1360-438: The reptiles into four subclasses based on the number and position of temporal fenestrae , openings in the sides of the skull behind the eyes. This classification was initiated by Henry Fairfield Osborn and elaborated and made popular by Romer 's classic Vertebrate Paleontology . Those four subclasses were: The composition of Euryapsida was uncertain. Ichthyosaurs were, at times, considered to have arisen independently of

1400-789: The structure of the forebrain. According to Goodrich, both lineages evolved from an earlier stem group, Protosauria ("first lizards") in which he included some animals today considered reptile-like amphibians , as well as early reptiles. In 1956, D.M.S. Watson observed that the first two groups diverged very early in reptilian history, so he divided Goodrich's Protosauria between them. He also reinterpreted Sauropsida and Theropsida to exclude birds and mammals, respectively. Thus his Sauropsida included Procolophonia , Eosuchia , Millerosauria , Chelonia (turtles), Squamata (lizards and snakes), Rhynchocephalia , Crocodilia , " thecodonts " ( paraphyletic basal Archosauria ), non- avian dinosaurs , pterosaurs , ichthyosaurs , and sauropterygians . In

1440-585: The years following Gauthier's paper. The first such new definition, which attempted to adhere to the standards of the PhyloCode , was published by Modesto and Anderson in 2004. Modesto and Anderson reviewed the many previous definitions and proposed a modified definition, which they intended to retain most traditional content of the group while keeping it stable and monophyletic. They defined Reptilia as all amniotes closer to Lacerta agilis and Crocodylus niloticus than to Homo sapiens . This stem-based definition

1480-625: Was Hylonomus , a small and superficially lizard-like animal which lived in Nova Scotia during the Bashkirian age of the Late Carboniferous , around 318  million years ago . Genetic and fossil data argues that the two largest lineages of reptiles, Archosauromorpha (crocodilians, birds, and kin) and Lepidosauromorpha (lizards, and kin), diverged during the Permian period. In addition to

1520-592: Was close to the modern consensus, nonetheless, it became considered inadequate because the actual relationship of turtles to other reptiles was not yet well understood at this time. Major revisions since have included the reassignment of synapsids as non-reptiles, and classification of turtles as diapsids. Gauthier 1994 and Laurin and Reisz 1995's definition of Sauropsida defined the scope of the group as distinct and broader than that of Reptilia, encompassing Mesosauridae as well as Reptilia sensu stricto . A variety of other definitions were proposed by other scientists in

1560-583: Was established in March 1999, through the " Declaration of Yaoundé ". In February 2005, the organization adopted a "Convergence Plan for improved management and conservation of forests in Central Africa." Established in 2007, the Central African Forest Observatory (OFAC) is a specialized unit of the COMIFAC, which provides up-to-date and relevant data on the forests and ecosystems of the region, with

1600-615: Was not the only possible classification scheme: In the Hunterian lectures delivered at the Royal College of Surgeons in 1863, Huxley grouped the vertebrates into mammals , sauroids, and ichthyoids (the latter containing the fishes and amphibians). He subsequently proposed the names of Sauropsida and Ichthyopsida for the latter two groups. In 1866, Haeckel demonstrated that vertebrates could be divided based on their reproductive strategies, and that reptiles, birds, and mammals were united by

#927072