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The distribution of Schramocaris (Eumalacostraca, Crustacea) along the northwestern coast of the Rheic Ocean during the Lower Carboniferous

Published online by Cambridge University Press:  08 January 2018

Neil D. L. Clark ,
Randall F. Miller  and
Andrew J. Ross
Neil D. L. Clark*
Affiliation:
The Hunterian, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK. Email: [email protected]
Randall F. Miller
Affiliation:
Natural Science Department, New Brunswick Museum, Saint John, New Brunswick, CanadaE2K 1E5.
Andrew J. Ross
Affiliation:
Department of Natural Sciences, National Museums Scotland, Chambers Street, Edinburgh EH1 1JF, UK
*
*Corresponding author
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Abstract

Two new species of Schramocaris from the Viséan, Lower Carboniferous of Scotland and eastern Canada extend the range and distribution of this crustacean along the northwestern coast of the Rheic Ocean. New species from Glencartholm, southern Scotland and Upperton, New Brunswick, Canada represents the first recognised occurrence of this genus in Scotland and Canada. The Scottish species is here named S. clarksoni; it lacks the rugosity of the carinae of Schramocaris gilljonesorum, but has the same relative position of the carinae, as well as similar characteristics of the pleon, such as the relative lengths of the somites and the shape of the telson. The Canadian species is named Schramocaris matthewi on the basis of the papillations on the cuticle and robust second carinae of the carapace. The deposits at both these localities are that of a shallow marine argillaceous environment, although the Glencartholm deposit contains more lime. Schramocaris has previously only been known from the Avon Group (Hastarian) of the Forest of Dean, England.

Keywords

CanadacrustaceanmarineScotlandTealliocarisViséan
Type
Articles
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 107 , Issue 2-3: Fossil Insects, Arthropods and Amber , June 2016 , pp. 91 - 98
Copyright
Copyright © The Royal Society of Edinburgh 2018 

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