Evolution of fish
The cast of fish began about 530 seconds ago during the Cambrian explosion. Early fish from the fossil record are represented by a group of small, jawless, armoured fish known as ostracoderms. Jawless fish lineages are mostly extinct. An extant clade, the lampreys may approximate ancient pre-jawed fish. The first jaws are found in Placoderm fossils. The diversity of jawed vertebrates may indicate the evolutionary advantage of a jawed mouth. It is unclear if the advantage of a hinged jaw is greater biting force, improved respiration, or a combination of factors. The evolution of fish is not studied as a single event since fish do not represent a monophyletic group but a paraphyletic one (by exclusion of the tetrapods).
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Evolution of fish
The cast of fish began about 530 seconds ago during the Cambrian explosion. Early fish from the fossil record are represented by a group of small, jawless, armoured fish known as ostracoderms. Jawless fish lineages are mostly extinct. An extant clade, the lampreys may approximate ancient pre-jawed fish. The first jaws are found in Placoderm fossils. The diversity of jawed vertebrates may indicate the evolutionary advantage of a jawed mouth. It is unclear if the advantage of a hinged jaw is greater biting force, improved respiration, or a combination of factors. The evolution of fish is not studied as a single event since fish do not represent a monophyletic group but a paraphyletic one (by exclusion of the tetrapods).
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L'histoire évolutive des poiss ...... i lui servait d'épine dorsale.
@fr
The cast of fish began about ...... y exclusion of the tetrapods).
@en
Эволю́ция рыб представляет соб ...... ся предками всех четвероногих.
@ru
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37,824,359
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745,332,845
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Animation showing life at different evolutionary stages
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Comparison between the fins of ...... . Acanthostega 5. Ichthyostega
Illustration showing shows how ...... o become a terrestrial animal.
Somewhat dated view of continuous evolutionary gradation
Spindle diagram for the evolut ...... acoderms and the spiny sharks.
The early vertebrate Haikouich ...... ne of the earliest known fish.
The lancelet, a small, translu ...... relative of the olfactoreans .
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Vertebrate classes
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The Devonian period 419–359 Ma ...... tetrapod transitional species
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:Jawless fish
:†Armoured fish
:Cartilaginous fish
:Ray-finned fish
:Lobe-finned fishes
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Bothriolepis – Animal Planet
Chordate Evolution and Bony Fish YouTube
Chordate evolution – YouTube
Dunkleosteus – Animal Planet
Eusthenopteron – Animal Planet
Evolution Of Jaws 1 of 5 Animal Planet
Evolution Of Jaws 2 of 5 Animal Planet
Evolution Of Jaws 3 of 5 Animal Planet
Evolution fish with fingers Transitional fossils – YouTube
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L'histoire évolutive des poiss ...... tudiée comme un événement uniq
@fr
The cast of fish began about ...... y exclusion of the tetrapods).
@en
Эволю́ция рыб представляет соб ...... ся предками всех четвероногих.
@ru
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Evolution of fish
@en
Histoire évolutive des poissons
@fr
Эволюция рыб
@ru