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It has the combination of both ray-finned and lobe-finned features, although analysis of the totality of its features places it closer to lobe-finned fish. [2] [3] [4] Early lobe-finned fishes are bony fish with fleshy, lobed, paired fins, which are joined to the body by a single bone. [5] The fins of lobe-finned fishes differ from those of all ...
The main features of typical ray-finned fish are shown in the adjacent diagram. The swim bladder is a more derived structure and used for buoyancy . [ 5 ] Except from the bichirs , which just like the lungs of lobe-finned fish have retained the ancestral condition of ventral budding from the foregut , the swim bladder in ray-finned fishes ...
Evolution of ray-finned fishes, Actinopterygii, from the Devonian to the present as a spindle diagram. The width of the spindles are proportional to the number of families as a rough estimate of diversity. The diagram is based on Benton, M. J. (2005) Vertebrate Palaeontology, Blackwell, 3rd edition, Fig 7.13 on page 185.
Class Placodermi (armoured fish) † Class Acanthodii ("spiny sharks", sometimes classified under Actinopterygii) † Superclass Osteichthyes (bony fish) Class Actinopterygii (ray finned fishes) Clade Sarcopterygii (lobe finned fishes, ancestors of tetrapods) The above scheme is the one most commonly encountered in non-specialist and general works.
This category contains articles about taxa at the order level in the class Actinopterygii, the ray-finned fishes. The ray-finned fishes contain most of the species of fish and these are divided into 46 orders. Most of the fishes known to aquarists and anglers are within this class. **Subcategories are listed below for all 46 orders and examples ...
Leedsichthys is an extinct genus of pachycormid fish that lived in the oceans of the Middle to Late Jurassic. [1] It is the largest ray-finned fish, and amongst the largest fish known to have ever existed. [2] The first remains of Leedsichthys were identified in the nineteenth century.
Fish portal; Bichirs / ˈ b ɪ ʃ ɪər z / and the reedfish comprise Polypteridae / p ɒ l ɪ p ˈ t ɛ r ɪ d iː /, a family of archaic ray-finned fishes and the only family in the order Polypteriformes / p ə ˈ l ɪ p t ə r ɪ f ɔːr m iː z /. [2] All the species occur in freshwater habitats in tropical Africa and the Nile River system ...
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 .