Advanced forms transitional between fish and the early labyrinthodonts, such as Tiktaalik, have been referred to as "fishapods" by their discoverers, being half-fish, half-tetrapods, in appearance and limb morphology.

Among the characteristics defining tetrapodomorphs are modifications to the fins, notably a humerus with convex head articulating with the glenoid fossa (the socket of the shoulder joint).

[2] Tetrapodomorph fossils are known from the early Devonian onwards, and include Osteolepis, Panderichthys, Kenichthys and Tungsenia.

[1] Tetrapodomorpha evolved from ancient lobe-finned fish (sarcopterygians) around 390 million years ago in the Middle Devonian period.

[9] Dipnomorpha Kenichthys Tungsenia Hongyu Gooloogongia Sauripterus Barameda Screbinodus Rhizodus Strepsodus Gyroptychius Osteolepis Gogonasus Medoevia Megalichthyidae Beelarongia Canowindra Koharalepis Marsdenichthys Spodichthys Tristichopterus Eusthenopteron Jarvikina Cabonnichthys Platycephalichthys Mandageria Eusthenodon Tinirau Bruehnopteron Panderichthys Tiktaalik Elpistostege Ventastega Acanthostega Ichthyostega Tulerpeton