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2. Evolution of tetrapods - Wikipedia

   en.wikipedia.org/wiki/Evolution_of_tetrapods

   The evolution of tetrapods began about 400 million years ago in the Devonian Period with the earliest tetrapods evolved from lobe-finned fishes. [1] Tetrapods (under the apomorphy-based definition used on this page) are categorized as animals in the biological superclass Tetrapoda, which includes all living and extinct amphibians, reptiles, birds, and mammals.

3. Choana - Wikipedia

   en.wikipedia.org/wiki/Choana

   The choanae (internal nostrils) of a cat, indicated by the dashed lines and bounded by the vomer (blue gray) and the palatine bone (orange). The choanae (sg.: choana), posterior nasal apertures or internal nostrils are two openings found at the back of the nasal passage between the nasal cavity and the pharynx, in humans and other mammals (as well as crocodilians and most skinks).

4. Tetrapodomorpha - Wikipedia

   en.wikipedia.org/wiki/Tetrapodomorpha

   Tetrapoda. See also below. Tetrapodomorpha (also known as Choanata[3]) is a clade of vertebrates consisting of tetrapods (four-limbed vertebrates) and their closest sarcopterygian relatives that are more closely related to living tetrapods than to living lungfish. Advanced forms transitional between fish and the early labyrinthodonts, such as ...

5. Lungfish - Wikipedia

   en.wikipedia.org/wiki/Lungfish

   Lungfish. Lungfish are freshwater vertebrates belonging to the class Dipnoi. [1] Lungfish are best known for retaining ancestral characteristics within the Osteichthyes, including the ability to breathe air, and ancestral structures within Sarcopterygii, including the presence of lobed fins with a well-developed internal skeleton.

6. Tetrapod - Wikipedia

   en.wikipedia.org/wiki/Tetrapod

   Tetrapod. A tetrapod (/ ˈtɛtrəˌpɒd /; [5] from Ancient Greek τετρα- (tetra-) 'four' and πούς (poús) 'foot') is any four- limbed vertebrate animal of the superclass Tetrapoda (/ tɛˈtræpədə /). [6] Tetrapods include all extant and extinct amphibians and amniotes, with the latter in turn evolving into two major clades, the ...

7. Kenichthys - Wikipedia

   en.wikipedia.org/wiki/Kenichthys

   Kenichthys. Kenichthys is a genus of sarcopterygian fish from the Devonian period, and a member of the clade Tetrapodomorpha. The only known species of the genus is Kenichthys campbelli (named for the Australian palaeontologist Ken Campbell), the first remains of which were found in China in 1993. [2] The genus is important to the study of the ...