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Brachygobius sabanus belongs to the class Actinopterygii, known as the ray-finned fishes, which encompasses a vast number of fish species and represents half of all living vertebrates on Earth. [3] [4] B. sabanus is part of the order of Gobiiformes, and are further categorized into the genus Brachygobius and species sabanus. [5]
Actinopterygii (/ ˌ æ k t ɪ n ɒ p t ə ˈ r ɪ dʒ i aɪ /; from Ancient Greek ἀκτίς (aktis) 'having rays' and πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish [2] that comprise over 50% of living vertebrate species. [3]
Actinopterygii: Subclass: Chondrostei: Order: Acipenseriformes L. S. Berg, 1940: Subgroups Genus †Eochondrosteus? Family †Chondrosteidae (sometimes placed in its own order) Family †Peipiaosteidae; Suborder Acipenseroidei. Family Acipenseridae (sturgeon) Family Polyodontidae (paddlefish)
The exact position in the phylogenetic tree is debated. Andreolepis has been considered a primitive actinopterygian, partly based on scale characteristics and the presence of ganoine, a homologue to true enamel, [8] which was thought to be limited to actinopterygians whereas true enamel is limited to sarcopterygians.
Euteleostei, whose members are known as euteleosts, is a clade of bony fishes within Teleostei that evolved some 240 million years ago, although the oldest known fossil remains are only from the Early Cretaceous. [1]
Esocidae is a family of ray-finned fish in the order Salmoniformes, which contains pike, pickerel, and mudminnows. [1] While the family traditionally only contained the genus Esox, recent genetic and paleontological research have recovered Novumbra and Dallia as members of the family Esocidae, being closer related to Esox than Umbra.
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Fossil of Chondrosteus acipenseroides from Lyme Regis Strongylosteus hindenburgi fossil from Posidonia Shale, Staatliches Museum für Naturkunde Stuttgart. Chondrosteidae / ˌ k ɒ n d r oʊ s t i ˈ aɪ d iː / is a family of extinct marine actinopterygian fishes, known from the Early Jurassic of Europe.
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