A new Cambrian catillicephalid trilobite from the Shallow Bay Formation of western Newfoundland, Canada

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 Newfoundla...

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Bibliographic Details
Published in:Acta Palaeontologica Polonica
Main Authors: STEPHEN R. WESTROP, ALYCE A. DENGLER
Format: Article in Journal/Newspaper
Language:English
Published: Institute of Paleobiology PAS 2022
Subjects:
trilobita
catillicephala
cambrian
laurentia
north america
Fossil man. Human paleontology
GN282-286.7
Paleontology
QE701-760
Canada
Greenland
Cow Head
Shallow Bay
Downes Point
Newfoundland
North Greenland
Online Access:https://doi.org/10.4202/app.00922.2021
https://doaj.org/article/8b16d7cbf031494689c1b4fb8015683f
Description
Summary: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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