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Sarcopterygii (/ ˌ s ɑːr k ɒ p t ə ˈ r ɪ dʒ i. aɪ /; from Ancient Greek σάρξ (sárx) ' flesh ' and πτέρυξ (ptérux) ' wing, fin ') — sometimes considered synonymous with Crossopterygii (from Ancient Greek κροσσός (krossós) ' fringe ') — is a clade (traditionally a class or subclass) of vertebrate animals which includes a group of bony fish commonly referred to as ...
This list of lobe-finned fish is a comprehensive listing of all genera that have ever been included in the class Sarcopterygii, excluding purely vernacular terms and tetrapods. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful ( nomen dubium ), or were not formally published ( nomen nudum ...
The lobe-finned fishes are chordates of the clade Sarcopterygii. While traditionally excluded, the tetrapods (including all birds and land vertebrates ) are now included in Sarcopterygii according to cladistic taxonomy .
In the Late Devonian vertebrate speciation, descendants of pelagic lobe-finned fish—like Eusthenopteron—exhibited a sequence of adaptations: Panderichthys, suited to muddy shallows; Tiktaalik with limb-like fins that could take it up onto land; and Early tetrapods in weed-filled swamps, such as Acanthostega which had feet with eight digits ...
Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish (Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central ...
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]
Guiyu was initially described as a basal lobe-finned fish with anatomical features of both ray-finned and lobe-finned fishes. [2] Guiyu sheds light on the early diversification of bony fishes. This clade, the osteichthyans, splits in two clades: the lobe-finned fishes (sarcopterygians) and the ray-finned fishes (actinopterygians).
Prehistoric lobe-finned fish stubs (166 P) Pages in category "Prehistoric lobe-finned fish" The following 2 pages are in this category, out of 2 total.