Journal article
Notchpeakia, a new genus of Upper Cambrian (Sunwaptan) "entomaspidid" trilobites
Journal of paleontology, Vol.80(6), pp.1152-1171
11/01/2006
DOI: 10.1666/0022-3360(2006)80[1152:NANGOU]2.0.CO;2
Abstract
Trilobites previously assigned to the Entomaspididae Ulrich in Bridge, 1931 are common in Laurentian strata assigned to the upper Sunwaptan Stage of the Upper Cambrian. Most species are poorly known, and typically only sparse cranidial data are available. Large silicified samples from the Lava Dam Member of the Notch Peak Formation, western Utah, contain three new species for which cranidia, librigenae, thoracic segments, and pygidia are known. The species permit clarification of the morphology and affinities of previously described taxa from elsewhere. They are referred to Notchpeakia n. gen. (type species: N. milleri n. sp.) which, in addition to the type includes N. taylori n. sp., N. notchpeakensis n. sp., N. cherrycreekensis n. sp., and N. varga (Westrop, 1986). The "entomaspidid" trilobites are assigned to the traditionally post-Cambrian Harpetidae Hawle and Corda, 1847.
Details
- Title: Subtitle
- Notchpeakia, a new genus of Upper Cambrian (Sunwaptan) "entomaspidid" trilobites
- Creators
- Jonathan M Adrain - University of IowaStephen R Westrop - American Museum of Natural History
- Resource Type
- Journal article
- Publication Details
- Journal of paleontology, Vol.80(6), pp.1152-1171
- Publisher
- Paleontological Society
- DOI
- 10.1666/0022-3360(2006)80[1152:NANGOU]2.0.CO;2
- ISSN
- 0022-3360
- eISSN
- 1937-2337
- Language
- English
- Date published
- 11/01/2006
- Academic Unit
- Earth and Environmental Sciences
- Record Identifier
- 9984229291602771
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