Entomaspis
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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.[1]
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.[2]
References
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- ^ Shaw, Alan B. "Paleontology of Northwestern Vermont. XII. Fossils from the Ordovician Highgate Formation." Journal of Paleontology (1966): 1312-1330.
- ^ Page Module:Citation/CS1/styles.css has no content.Moore, R.C. (1959). Arthropoda I - Arthropoda General Features, Proarthropoda, Euarthropoda General Features, Trilobitomorpha. Treatise on Invertebrate Paleontology. Vol. Part O. Boulder, Colorado/Lawrence, Kansas: Geological Society of America/University of Kansas Press. pp. 1–560, 419. ISBN 0-8137-3015-5.
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Sources
External links
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