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Interpretation of the Middle Jurassic ammonite genus Spiroceras

Published online by Cambridge University Press:  01 May 2009

M. K. Howarth  and
R. V. Melville
M. K. Howarth
Affiliation:
Department of Palaeontology, British Museum (Natural History), Cromwell Road, London SW7 5BD
R. V. Melville
Affiliation:
International Commission on Zoological Nomenclature, British Museum (Natural History), Cromwell Road, London SW7 5BD
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Abstract

The taxonomy of the Middle Jurassic ammonite genus Spiroceras Quenstedt, 1856, is critically assessed. It is found that the genus was originally proposed conditionally without any included species, and the type species is Spiroceras bifurcatum Hyatt, 1900, by subsequent monotypy. A neotype is now designated for that species, because Hyatt's figured holotype is lost.

Type
Articles
Information
Geological Magazine , Volume 121 , Issue 2 , March 1984 , pp. 131 - 132
Copyright
Copyright © Cambridge University Press 1984

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