期刊
ACTA PALAEONTOLOGICA POLONICA
卷 67, 期 1, 页码 27-33出版社
INST PALEOBIOLOGII PAN
DOI: 10.4202/app.00922.2021
关键词
Trilobita; Catillicephala; Cambrian; Laurentia; North America
类别
资金
- Natural Sciences and Engineering Research Council of Canada
- National Science Foundation (USA)
A new fossil species of Catillicephala, C. cifellii, is discovered from the mid-Cambrian margin of Laurentian North America. It is among the oldest representatives of the genus, dating back to the early Guzhangian period.
Species of Catillicephala are known from sites around the mid-Cambrian margin of Laurentian North America, including Vermont, Quebec, Newfoundland and North Greenland. Catillicephala cifellii sp. nov. is from the Downes Point Member of the Shallow Bay Formation (Cow Head Group) in western Newfoundland. It occurs in three shelf margin-derived boulders in debris flow conglomerates that accumulated in a continental slope setting. The associated trilobites and agnostoid arthropods, including Ptychagnostus aculeatus and Megagnostus glandiformis, indicate a correlation with the Lejopyge laevigata Zone. As such, C. cifellii is among the oldest representatives of the genus, and is early Guzhangian in age.
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