''Ibexaspis'' is a genus of
trilobites in the order
Phacopida (family
Pliomeridae
Pliomeridae is a family of phacopide trilobites, containing the following genera:
*'' Anapliomera''
*'' Benedettia''
*'' Canningella''
*'' Colobinion''
*'' Coplacoparia''
*'' Cybelopsis''
*'' Ectenonotus''
*'' Encrinurella''
*'' Evropeites''
...
), that existed during the lower
Ordovician in what is now the
United States. It was described by Pribyl and Vanek in 1985, and the
type species is ''Ibexaspis quattuor'', which was originally described under the genus ''
Protopliomerops'' as the
subspecies
In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...
''P. quattuor brevis'' by Young in 1973. The
type locality was the
Fillmore Formation in
Utah.
Available Generic Names for Trilobites
P.A. Jell and J.M. Adrain.
References
External links
''Ibexaspis''
at the Paleobiology Database
Pliomeridae
Phacopida genera
Fossil taxa described in 1985
Ordovician trilobites
Fossils of the United States
{{Phacopida-stub