Entomaspis

{{Short description|Extinct genus of trilobites}} {{Automatic taxobox | fossil_range = {{Fossil range|Furongian|Tremadocian}} | image = Entomaspis radiata.JPG | image_caption = ''E. radiata'' | taxon = Entomaspis | authority = Ulrich, 1931 | type_species=''Entomaspis radiata'' | type_species_authority = Ulrich, 1931 | subdivision_ranks = Species | subdivision = *''E. bridgei'' Rasetti 1952 *''E. clarki'' Raymond 1937 *''E. radiata'' Ulrich, 1931 *''E. rawi'' (Ross Jr. 1951) }}

'''''Entomaspis''''' is an extinct genus of harpetid trilobite from Upper Cambrian to Early Ordovician marine strata of the United States. Species are typified by their proportionally large, vaulted, croissant-shaped or bonnet-shaped cephalons that have the cheeks freed to become elongated, curved librigenial spines, and by their comparatively large, crescent-shaped eyes (in comparison with other eyed harpetids).

==Species==

===''E. bridgei''=== ''E. bridgei'' is a species found in marine strata of Missouri.

===''E. clarki''=== ''E. clarki'' is a species found in Lower Ordovician marine strata of Vermont.<ref name=Shaw>Shaw, Alan B. "Paleontology of Northwestern Vermont. XII. Fossils from the Ordovician Highgate Formation." Journal of Paleontology (1966): 1312-1330.</ref>

===''E. radiata''=== ''E. radiata'' is the type species, and is found in Uppermost Cambrian and Lowermost Ordovician marine strata of Utah. It coexisted sympatrically with ''E. rawi''.

===''E. rawi''=== ''E. rawi'' was originally described as ''Hypothetica rawi'', and coexisted with ''E. radiata'' in Lowermost Ordovician marine strata of Utah.<ref name='Treatise'>{{cite book|last= Moore|first= R.C.|year= 1959|title= Arthropoda I - Arthropoda General Features, Proarthropoda, Euarthropoda General Features, Trilobitomorpha|publisher= Geological Society of America/University of Kansas Press|series= Treatise on Invertebrate Paleontology|volume= Part O.|pages=1–560, 419|location= Boulder, Colorado/Lawrence, Kansas|isbn= 0-8137-3015-5}}</ref>

==References== {{Reflist}}

== Sources == *[http://www.trilobites.info/galharpetida.htm'' Trilobite info (Sam Gon III)'']

==External links== *[http://www.trilobites.info '' Trilobite info (Sam Gon III)'']

Category:Harpetida Category:Cambrian trilobites Category:Ordovician trilobites Category:Fossils of the United States Category:Ordovician genus extinctions Category:Trilobite genera