期刊
PALAEONTOLOGY
卷 46, 期 -, 页码 945-986出版社
BLACKWELL PUBLISHING LTD
DOI: 10.1111/1475-4983.00328
关键词
Lower/Middle Cambrian boundary; international correlation; trilobites
类别
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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