New genus of dimeropygid trilobites from the earliest Ordovician of Laurentia

Jonathan M Adrain; Stephen R Westrop

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New genus of dimeropygid trilobites from the earliest Ordovician of Laurentia

Journal article

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New genus of dimeropygid trilobites from the earliest Ordovician of Laurentia

Jonathan M Adrain and Stephen R Westrop

Acta palaeontologica Polonica, Vol.51(3), pp.541-550

2006

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Abstract

The new genus Tulepyge includes a type species, T. tulensis nov., from the Barn Canyon Member of the House Formation, western Utah, USA, and T. paucituberculata from the Broom Point Member of the Green Point Formation, western Newfoundland, Canada. Both species are earliest Ordovician in age, with occurrence immediately above the Cambrian-Ordovician boundary. Together with the hystricurid taxon Millardicurus, the new genus is likely to serve as an indicator fossil for the Cambrian-Ordovician boundary in Laurentia, as it is already known from different biofacies on opposite margins of the continent. Tulepyge is not closely comparable with contemporaneous taxa assigned to Hystricuridae but in its dorsally convex and coarsely tuberculate exoskeleton it resembles taxa which have been referred to Dimeropygidae, most of which are considerably younger in age.

Canada

North America

Paleoecology

Stratigraphy

United States

Arthropoda

Barn Canyon Member

Broom Point Member

Dimeropygidae

Eastern Canada

Green Point Formation

House Limestone

Ibexian

index fossils

Invertebrata

Invertebrate paleontology

Laurentia

Lower Ordovician

new taxa

Newfoundland

Newfoundland and Labrador

Ordovician

Paleozoic

Trilobita

Trilobitomorpha

Tulepyge

Tulepyge paucituberculata

Tulepyge tulensis

Utah

western Newfoundland

western Utah

Details

Title: Subtitle: New genus of dimeropygid trilobites from the earliest Ordovician of Laurentia
Creators: Jonathan M Adrain - University of Iowa
Stephen R Westrop - Oklahoma Museum of Natural History USA United States
Resource Type: Journal article
Publication Details: Acta palaeontologica Polonica, Vol.51(3), pp.541-550
Publisher: Panstwowe Wydawnictwo Naukowe
ISSN: 0567-7920
eISSN: 1732-2421
Language: English
Date published: 2006
Academic Unit: Earth and Environmental Sciences
Record Identifier: 9984229305802771

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