Occurrence of the Ordovician-type aglaspidid Tremaglaspis in the Cambrian Weeks Formation (Utah, USA)

Lerosey-Aubril, Rudy and Ortega-Hernández, Javier and Kier, Carlo and Bonino, Enrico (2013) Occurrence of the Ordovician-type aglaspidid Tremaglaspis in the Cambrian Weeks Formation (Utah, USA). Geological Magazine, 150 (05). pp. 945-951. ISSN 0016-7568, ESSN: 1469-5081 DOI 10.1017/S001675681300037X

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Abstract

The Guzhangian Weeks Formation preserves a diverse, yet virtually unstudied, non-trilobite arthropod fauna. Here we describe Tremaglaspis vanroyi sp. nov., the oldest representative of an enigmatic group of extinct arthropods, the Aglaspidida. Tremaglaspis was previously known from the Lower Ordovician and its morphology was regarded as particularly derived within the clade. Its occurrence in the Cambrian of Utah suggests that much of the early evolutionary history of the Aglaspidida remains unknown. A review of the environmental settings of previous aglaspidid findings suggests that these arthropods preferentially inhabited shallow-water environments, which may partially explain their limited fossil record.

Item Type:	Article
Uncontrolled Keywords:	2013AREP; IA66; PhD
Subjects:	04 - Palaeobiology
Divisions:	04 - Palaeobiology
Journal or Publication Title:	Geological Magazine
Volume:	150
Page Range:	pp. 945-951
Identification Number:	10.1017/S001675681300037X
Depositing User:	Sarah Humbert
Date Deposited:	30 Aug 2013 17:36
Last Modified:	02 Sep 2013 13:25
URI:	http://eprints.esc.cam.ac.uk/id/eprint/2877

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