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GEOREF RECORD

A new crinoid morphotaxon from the Silurian (Llandovery) of south-west Scotland (Ayrshire)

Stephen K. Donovan, Gary Hoare, Neil D. L. Clark, Ben Dixon and Fiona E. Fearnhead
A new crinoid morphotaxon from the Silurian (Llandovery) of south-west Scotland (Ayrshire)
Scottish Journal of Geology (September 2024) 60 (2)

Abstract

There is little known of the diversity of Silurian crinoids in Scotland. Rather than wait in hope for a new Lagerstaette, our knowledge of the fauna can be improved by recognising imperfectly preserved specimens, such as disarticulated columnals. Pentagonopentagonalis (col.) annulus sp. nov. is here recorded from the Llandovery (Rhuddanian) Mulloch Hill Sandstone Formation of Ayrshire. It is known only from disarticulated columnals, most without counterpart, and rare pluricolumnals. The column is xenomorphic, and columnals can vary from pentagonal (probably proximal) to rounded/circular (more distal?), each with a moderately broad lumen that is similarly shaped. There is no areola and the articulation is radial symplectial. Pluricolumnals are heteromorphic, perhaps N3231323. This morphospecies is described to demonstrate something of the wealth of information and inference that may be gleaned from even the most unpromising material.


ISSN: 0036-9276
EISSN: 2041-4951
Coden: SJGEAX
Serial Title: Scottish Journal of Geology
Serial Volume: 60
Serial Issue: 2
Title: A new crinoid morphotaxon from the Silurian (Llandovery) of south-west Scotland (Ayrshire)
Affiliation: Swinton, Greater Manchester, United Kingdom
Pages: Article sjg2024-007
Published: 20240927
Text Language: English
Publisher: Geological Society Publishing House for the Geological Societies of Edinburgh and Glasgow, Bath, United Kingdom
References: 26
Accession Number: 2024-076604
Categories: General paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 7 plates, sketch maps
N55°46'00" - N55°46'00", W03°25'00" - W03°25'00"
N55°00'00" - N55°49'60", W05°00'00" - W03°30'00"
Secondary Affiliation: University of Glasgow, GBR, United KingdomThe Natural History Museum, London, GBR, United Kingdom
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2025, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 202444
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