Priscacara Fossil, Eocene Sunfish

Priscacara Fossil, Eocene Sunfish

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Credit: USGS/Science Source/SCIENCE PHOTO LIBRARY

Caption: A prepared Priscacara fossil, of a late early Eocene sunfish. The specimen is about 80% of it's natural size. It was collected from the Green River Formation 9 miles west of Kemmerer, Wyoming in 1984. Priscacara is an extinct genus of perch from the middle Eocene. It is characterized by a sunfish-like body and its stout dorsal and anal spines. A phylogenetic review of Priscacara by Whitock, found only two species, P. serrata and P. liops. The two species differ in the number of dorsal and anal fin rays, as well as possibly a coarser serrated rear edge of the preopercle in P. serrata,. P. liops also has small conical teeth on the pharyngeal jaw, whereas P. serrata has large grinding toothplates, suggesting a diet of snails and crustaceans.

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Keywords: 1980s, 1984, 20th century, america, american, ancient environment, cenozoic, cenozoic era, eocene, eocene epoch, eocene system, extinct, fauna, fish, fossil, green river formation, green river shale, palaeobiology, palaeontology, palaeozoology, paleobiology, paleozoology, prehistoric, prehistorical, prehistory, priscacara, sunfish-like, tertiary period, united states, us, usa, wyoming

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