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Article: Early and Mid Cambrian trilobites from the outer-shelf deposits of Nevada and California, USA

Publication: Palaeontology
Volume: 46
Part: 5
Publication Date: September 2003
Page(s): 945 986
Author(s): Frederick A. Sundberg and Linda B. McCollum
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How to Cite

SUNDBERG, F. A., MCCOLLUM, L. B. 2003. Early and Mid Cambrian trilobites from the outer-shelf deposits of Nevada and California, USA. Palaeontology46, 5, 945–986.

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Abstract

A latest Early Cambrian and earliest Mid Cambrian polymeroid trilobite fauna, consisting of 16 genera and 25 species, is reported from the peritidal deposits of the Mule Spring Limestone and outer-shelf deposits of the Emigrant and Monola formations of Nevada and California. The Mid Cambrian fauna includes a new genus, Tonopahella, and four new species, T. goldfieldensis, Oryctocephalus americanus, Onchocephalites claytonensis, and Syspacephalus variosus. The peri-Gondwana species Oryctocephalus orientalis, Oryctocephalites runcinatus, and Paraantagmus latus are recorded in Laurentia for the first time.
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