On Oanducystis (col.) Stukalina (Crinoidea) from the Craighead Limestone Formation, Girvan district, Ayrshire

Donovan, S. K. and Clark, N. D.L. (2020) On Oanducystis (col.) Stukalina (Crinoidea) from the Craighead Limestone Formation, Girvan district, Ayrshire. Scottish Journal of Geology, 56(1), pp. 81-84. (doi: 10.1144/sjg2019-022)

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Only two nominal species of crinoid, the diplobathrid camerates Diabolocrinus craigheadensis Ramsbottom and Diabolocrinus globularis (Nicholson & Etheridge), have been described from the Ordovician (Chatfieldian; Sandbian) Craighead Limestone Formation, Craighead quarry, near Girvan, Ayrshire. In contrast, columnal morphotaxa are represented by over 20 taxa including those in open nomenclature. Two thecae from Craighead quarry and referred to Diabolocrinus sp. or spp. preserve features of the stem facet that are similar to specimens referred to Oanducystis (col.) spp. from the same locality. These columnal morphotaxa are synonymised with Diabolocrinus and left in open nomenclature. However, Diabolocrinus is limited to Laurentia, whereas the remaining morphospecies of Oanducystis (col.) Stukalina are limited to Kazakhstan and Estonia.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Clark, Dr Neil
Authors: Donovan, S. K., and Clark, N. D.L.
College/School:University Services > Library and Collection Services > Museum and Art Gallery
Journal Name:Scottish Journal of Geology
Publisher:Geological Society
ISSN (Online):2041-4951
Published Online:12 February 2020
Copyright Holders:Copyright © 2020 The Authors
First Published:First published in Scottish Journal of Geology 56(1): 81-84
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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