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Pharyngolepis

From Wikipedia, the free encyclopedia

Extinct genus of jawless fishes

Pharyngolepis Temporal range:Late Silurian PreꞒ Ꞓ O S D C P T J K Pg N


Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Infraphylum:	Agnatha
Class:	†Anaspida
Order:	†Birkeniiformes
Family:	†Pharyngolepididae Kiær 1924 corrig.
Genus:	†Pharyngolepis Kiaer 1911
Type species
Pharyngolepis oblonga Kiær 1911
Species
P. heintziRitchie 1964 P. kiaeriSmith 1957 P. oblongaKiar 1911

Pharyngolepis is an extinct genus of primitivejawless fish that lived in theSilurian period of what is nowNorway.

Pharyngolepis had well-developedanal andcaudal fins, but no paired ordorsal fins that would have helped stabilise it in the water, and so was probably a poor swimmer, remaining close to the sea bottom. Thepectoral fins were instead replaced by bony spines, possibly for protection against predators, and there was a row of spines along the back. It probably scooped up food from the ocean floor.^[1]

References

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^Palmer, D., ed. (1999).The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 25.ISBN 1-84028-152-9.