Gogonasus was a fish that lived during the Devonian period, about 380 million years ago.
Fossils of the animal
were found in the Gogo Formation in the Kimberley region of Western
Australia.
The animal's name means "snout from Gogo" and reflects the fact that
it was initially described from a single fossilized snout (although subsequently well-preserved
3-dimensional fossils
of nearly the entire animal have been found).
Gogonasus was a lobe-finned fish that lived in a 870 mile (1400 kilometer) coral reef
that was once off the coast of Western
Australia.
It is an interesting animal as it shows a number of features transitional
between those of most lobe-finned fishes and early tetrapods (four-limbed animals
which eventually took to land). These transitional features include fins which
show the evolutionary precursors of tetrapod forearm bones (the radius and ulna),
as well as the structure of its inner ear.
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