Extant tetrapoda.jpg
Petter Bøckman
en
Extant tetrapoda, Four classes of extant tetrapods, The four classes of extant tetrapods, (clockwise from upper left), ''Rana'' (amphibian), ''Opisthocomus'' (bird), ''Eumeces'' (reptile) and ''Mus'' (mammal).

Original photos are:
* [[:File:Frog on bough.jpg]]
* [[:File:Rurrenabaque Bolivia - The Amazon.jpg]]
* [[:File:Verletzte Hausmaus.JPG]]
* [[:File:Eumeces laticeps (male).jpg]]
commons
en
Extant tetrapoda, Montages of Tetrapoda
commons
ja
現存する四足歩行の4つのクラス、現存の四足歩行の4つのクラス。オリジナルの写真は、次の通り。
commons_translated
ja
四足歩行の例外、テトラポダのモンタージュ
commons_translated
tetrapod extant superclass gnathostome eumeces opisthocomus gnathostomata