Hypsiprisca sp.

By oilshale (edited)

• September 25, 2016

Taxonomy

Kingdom: Animalia
Phylum: Chordata
Class: Actinopteri Cope 1871
Order: Perciformes Stirton 1953
Family: incertae sedis
Genus: Hypsiprisca
Species: Hypsiprisca sp.

Geological Time Scale

Eon: Phanerozoic
Era: Cenozoic
Period: Paleogene
Sub Period: None
Epoch: Eocene
International Age: Ypresian

Stratigraphy

Green River Formation
Fossil Butte Member

Provenance

Acquired by: Purchase/Trade

Dimensions

Length: 4.5 cm

Location

Nunn's Quarry
Kemmerer
Wyoming
United States

• eocene
• green river formation
• hypsacantha
• hypsiprisca
• nunns quarry
• priscacara hypsacantha
• wyoming

Comments

Grande distinguishes two forms of Hypsiprisca: Hypsiprisca hypsacantha (originally described by Cope in 1886 under the name Priscacara hypsacantha) and a second yet undescribed, closely related form Hypsiprisca sp.
H. sp. is more common than H. hypsacantha; H. sp. are mostly very small individuals less than 60mm long.
 

Quotation L. Grande (2013): "The second species that remains undescribed differs from H. hypsacantha in being more slender-bodied and having a more convex posterior tail fin margin (H. hypsacantha has a very slightly forked tail margin)."
 

References:
Whitlock, J. (2010) Phylogenetic relationships of the Eocene percomorph fishes †Priscacara and †Mioplosus Journal of Vertebrate Paleontology Volume 30 – Issue 4, pages 1037-1048.

Grande, L. T (2013) The Lost World of Fossil Lake: Snapshots from Deep Time. University of Chicago Press. ISBN: 13: 978-0-226-92296-6.