The holotype of Psephodus minutus, Wellburn, 1901 (chondrichthyes, cochliodontiformes) is a gastropod steinkern

Author:

Itano Wayne M.1ORCID

Affiliation:

1. Museum of Natural History, University of Colorado, Boulder, Colorado, 80309, USA

Abstract

The holotype of Psephodus minutus Wellburn, from the Millstone Grit Group (Carboniferous, Lower Pennsylvanian Series, Marsdenian Substage) of Lancashire (now Greater Manchester), England, was originally interpreted as a set of three articulated tooth plates of a chondrichthyan fish. No figure was published with the description, though a drawing was published 32 years later. Examination of the specimen shows it to be a steinkern of an indeterminate high-spired gastropod. Psephodus minutus is thus rendered as a nomen nudum.

Publisher

Geological Society of London

Subject

Geology

Reference26 articles.

1. Agassiz, L. 1833–1843. Recherches sur les Poissons Fossiles. Petitpierre, Neuchâtel, Switzerland.

2. Aitkenhead, N. , Barclay, W.J. , Brandon, A. , Chadwick, R.A. , Chisholm, J.I. , Cooper, A.H. and Johnson, E.W. 2002. The Pennines and Adjacent Areas. 4th edn. British Geological Survey, Nottingham, UK.

3. THE CARBONIFEROUS GONIATITES OF THE NORTH OF ENGLAND AND THEIR ZONES

4. Notes on some Carboniferous cochliodonts with descriptions of seven new species;Branson;Journal of Geology,1905

5. British Geological Survey 2020 a. Geoindex Onshore, https://mapapps2.bgs.ac.uk/geoindex/home.html.

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