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Early and Mid Cambrian trilobites from the outer‐shelf deposits of Nevada and California, USA
Author(s) -
Sundberg Frederick A.,
McCollum Linda B.
Publication year - 2003
Publication title -
palaeontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.69
H-Index - 63
eISSN - 1475-4983
pISSN - 0031-0239
DOI - 10.1111/1475-4983.00328
Subject(s) - trilobite , paleontology , fauna , gondwana , laurentia , geology , genus , paleozoic , ordovician , ecology , biology , tectonics
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.