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

IF 1.8 3区地球科学 Q2 PALEONTOLOGY

Acta Palaeontologica Polonica Pub Date : 2022-01-01 DOI:10.4202/app.00922.2021

S. Westrop, Alyce A. Dengler

引用次数: 1

Abstract

A new Cambrian catillicephalid trilobite from the Shallow Bay Formation of western Newfoundland, Canada. Acta Palaeontologica Polonica 67 (1): 27–33. 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. which per-mits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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加拿大纽芬兰西部浅湾组一种新的寒武纪鱼头三叶虫

加拿大纽芬兰西部浅湾组一种新的寒武纪鱼头三叶虫。古生物学报67(1):27-33。Catillicephala的种类是在北美劳伦森地区的中寒武纪边缘地区发现的，包括佛蒙特州、魁北克、纽芬兰和北格陵兰岛。Catillicephala cifellii sp. 11 .来自纽芬兰西部浅湾组(牛头组)的Downes Point成员。它出现在陆坡环境下堆积的泥石流砾岩中的三个陆架边缘衍生的巨石中。伴生的三叶虫和无知虫节肢动物，包括ptychagnotus aculeatus和megagnotus glandiformis，表明与Lejopyge laevigata带有相关性。因此，C. cifellii是该属中最古老的代表之一，年龄在古张期早期。它允许在任何媒体上不受限制地使用、分发和复制，前提是要注明原作者和来源。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Palaeontologica Polonica 地学-古生物学

CiteScore

2.80

自引率

5.60%

发文量

审稿时长

12.5 months

期刊介绍： Acta Palaeontologica Polonica is an international quarterly journal publishing papers of general interest from all areas of paleontology. Since its founding by Roman Kozłowski in 1956, various currents of modern paleontology have been represented in the contents of the journal, especially those rooted in biologically oriented paleontology, an area he helped establish. In-depth studies of all kinds of fossils, of the mode of life of ancient organisms and structure of their skeletons are welcome, as those offering stratigraphically ordered evidence of evolution. Work on vertebrates and applications of fossil evidence to developmental studies, both ontogeny and astogeny of clonal organisms, have a long tradition in our journal. Evolution of the biosphere and its ecosystems, as inferred from geochemical evidence, has also been the focus of studies published in the journal.