| 词条 | Priscacara |
| 释义 |
| name = Priscacara | image = Priscacara liops Green River Formation.jpg | image_width = 250px | image_caption = Priscacara liops | fossil_range = Eocene | regnum = Animalia | phylum = Chordata | classis = Actinopterygii | ordo = Perciformes | familia = Percidae | genus = Priscacara | genus_authority = Cope 1877 | subdivision_ranks = Species | subdivision =
}} 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.[1] The fish is best known from the Green River Shales of Wyoming, Utah and Colorado. Mass deaths of Priscacara suggest it formed schools[1]. Two species are recognized,[2] of which the smaller species, P. liops is the most common. Priscacara fossils are common in the Fossil Lake deposits of western-most Wyoming and is rare in the Lake Gossiute deposits of Wyoming and the Lake Uinta deposits of Utah and Colorado[1]. It also occurs in the middle Eocene lake deposits of Washington and British Columbia[1]. A phylogenetic review of Priscacara by Whitock[2], 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[2],. P. liops also has small conical teeth on the pharyngeal jaw, whereas P. serrata has large grinding toothplates[2], suggesting a diet of snails and crustaceans[1]. References1. ^Grande, L. (1984). Paleontology of the Green River Formation, with a review of the fish fauna. Geological Survey of Wyoming Bulletin 63: 1-333 2. ^Whitlock, J. A. (2010). Phylogenetic relationships of the Eocene percomorph fishes Priscacara and Mioplosus. Journal of Vertebrate Paleontology, 30(4), 1037-1048. Sources
4 : Percidae|Prehistoric perciform genera|Eocene fish|Cenozoic fish of North America |
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