Pycnodontiformes is an extinct order of bony fish. The group evolved during the Late Triassic and disappeared during the Eocene. The group has been found in rock formations in Africa, Asia, Europe, North and South America. The pycnodontiforms were small to middle-sized fish, with laterally-compressed body and almost circular outline. Pycnodontifor...
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http://en.wikipedia.org/wiki/Pycnodontiformes
order of extinct fishes of the class Actinopterygii, containing the genus Pycnodus, common in the Jurassic seas of 208 to 144 million years ago. ... [1 related articles]
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http://www.britannica.com/eb/a-z/p/136
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