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Proc Biol Sci. 2012 Dec 12;280(1752):20122664. doi: 10.1098/rspb.2012.2664. Print 2013 Feb 7.

A Silurian myodocope with preserved soft-parts: cautioning the interpretation of the shell-based ostracod record.

Author information

1
Department of Geology, University of Leicester, Leicester LE1 7RH, UK. djs@leicester.ac.uk

Abstract

Ostracod crustaceans are the most abundant fossil arthropods. The Silurian Pauline avibella gen. et sp. nov., from the Herefordshire Lagerstätte, UK, is an extremely rare Palaeozoic example with soft-part preservation. Based on its soft-part morphology, especially the exceptionally preserved limbs and presence of lateral eyes, it is assigned to the myodocopid myodocopes. The ostracod is very large, with an epipod on the fifth limb pair, as well as gills implying the presence of a heart and an integrated respiratory-circulatory system as in living cylindroleberidid myodocopids. Features of its shell morphology, however, recall halocyprid myodocopes and palaeocopes, encouraging caution in classifying ostracods based on the carapace alone and querying the interpretation of their shell-based fossil record, especially for the Palaeozoic, where some 500 genera are presently assigned to the Palaeocopida.

PMID:
23235709
PMCID:
PMC3574317
DOI:
10.1098/rspb.2012.2664
[Indexed for MEDLINE]
Free PMC Article

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