Journal article

The Cretaceous ammonite Eopachydiscus and the origin of the Pachydiscidae.

Abstract:: Eopachydiscus Wright, 1955 is confirmed as the earliest, Upper Albian representative of the Pachydiscidae, derived in all probability from a bullate member of the Beaudanticeratinae and giving rise to the Cenomanian-Coniacian Lewesiceras Spath, 1939. Nuclei of Eopachydiscus are ribbed, tuberculate, and constricted, showing even at this stage and date typical pachydiscid ornament; the evolution of Lewesiceras simply involved retention of these features into middle growth. The suggestion that the Pachydiscidae arose from Arrhaphoceras Whitehouse, 1927 of the Hoplitinae is discounted on morphological, stratigraphical, and biogeographical grounds. -Authors

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APA Style

Kennedy, W., Wright, C., & Chancellor, G. (1983). The Cretaceous ammonite Eopachydiscus and the origin of the Pachydiscidae. Palaeontology, 26(3), 655–662.

MLA Style

Kennedy, W, et al. “The Cretaceous Ammonite Eopachydiscus and the Origin of the Pachydiscidae.” Palaeontology, vol. 26, no. 3, 1983, pp. 655–62.

Chicago Style

Kennedy, W, C Wright, and G Chancellor. 1983. “The Cretaceous Ammonite Eopachydiscus and the Origin of the Pachydiscidae.” Palaeontology 26 (3): 655–62.
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Authors

+ Kennedy, W More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Earth Sciences
Role:: Author

+ Wright, C More by this author

Role:: Author

+ Chancellor, G More by this author

Role:: Author

Journal:: Palaeontology More from this journal
Volume:: 26
Issue:: 3
Pages:: 655-662
Publication date:: 1983-01-01
ISSN:: 0031-0239

Language:: English
Pubs id:: pubs:81923
UUID:: uuid:eacc1de3-4175-4cb4-98d6-a070a693b4ff
Local pid:: pubs:81923
Source identifiers:: 81923
Deposit date:: 2012-12-19
ARK identifier:: ark:/29072/ora_eacc1de341754cb498d6a070a693b4ff

Terms of use

Copyright date:: 1983

Licence:: Terms and Conditions of Use for Oxford University Research Archive

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