4-398: Notopteroidei is a suborder of the order Osteoglossiformes that contains the extant families Gymnarchidae (aba), Notopteridae (feather backs and knifefish) and Mormyridae (elephantfishes), as well as several extinct taxa. The Mormyridae are weakly electric fishes , able to locate prey in turbid water. [REDACTED] [REDACTED] This Osteoglossiformes -related article
8-436: A separate order, Hiodontiformes . Members of the order are notable for having toothed or bony tongues, and for having the forward part of the gastrointestinal tract pass to the left of the oesophagus and stomach (for all other fish it passes to the right). In other respects, osteoglossiform fishes vary considerably in size and form; the smallest is Pollimyrus castelnaui , at just 2 centimetres (0.79 in) long, while
12-813: Is a stub . You can help Misplaced Pages by expanding it . Osteoglossiformes Osteoglossiformes / ˌ ɒ s t iː oʊ ˈ ɡ l ɒ s ɪ f ɔːr m iː z / (Greek: "bony tongues") is a relatively primitive order of ray-finned fish that contains two sub-orders, the Osteoglossoidei and the Notopteroidei . All of at least 245 living species inhabit freshwater. They are found in South America, Africa, Australia and southern Asia, having first evolved in Gondwana before that continent broke up. In 2008, several new species of marine osteoglossiforms were described from
16-745: The Danish Eocene Fur Formation , dramatically increasing the diversity of this group. This implies that the Osteoglossomorpha is not a primary freshwater fish group with the osteoglossiforms having a typical Gondwana distribution. The Gymnarchidae (the only species being Gymnarchus niloticus , the African knifefish ) and the Mormyridae are weakly electric fish able to sense their prey using electric fields. The mooneyes ( Hiodontidae ) are often classified here, but may also be placed in
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