Hostname: page-component-77c89778f8-vpsfw Total loading time: 0 Render date: 2024-07-21T05:29:13.628Z Has data issue: false hasContentIssue false
  • English
  • Français

A Study of the Type-Species of the Blastoid Codaster McCoy

Published online by Cambridge University Press:  01 May 2009

Kenneth A. Joysey
Kenneth A. Joysey
Affiliation:
Department of Geology, University College, London.
Get access Rights & Permissions [Opens in a new window]

Abstract

During a study of a Carboniferous blastoid fauna from Grassington, Yorkshire, over a thousand blastoids were collected, of which 45 individuals were referred to the genus Codaster. This study has left no doubt that the two species Codaster acutus McCoy and Codaster trilobatus McCoy are synonymous. Codaster trilobatus (in the sense of McCoy's original description), is an old age form, its characteristic feature only being attained by a minority of long-lived individuals. Codaster acutus McCoy is the valid name, being the first described, and is also the type-species for the genus. In order to supplement observation on these specimens, biometrical methods have been employed to study the relative growth of the height, diameter, and number of hydrospires.

Type
Articles
Information
Geological Magazine , Volume 90 , Issue 3 , June 1953 , pp. 208 - 218
Copyright
Copyright © Cambridge University Press 1953

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bather, F. A., 1899. List of Genera and Species of Blastoidea in the British Museum. London.Google Scholar
Dujardin, F., and Hupé, H., 1862. Histoire Naturelle des Zoophytes Echinodermes. Paris.Google Scholar
Etheridge, R., and Carpenter, P. H., 1882. The Morphology of the Blastoidea, with Descriptions of some new Genera and Species. Ann. Mag. Nat. Hist., 5, ix, 213.CrossRefGoogle Scholar
Etheridge, R., and Carpenter, P. H., 1886. Catalogue of the Blastoidea in the Geological Department of the British Museum. London.Google Scholar
Fisher, R. A., and Yates, F., 1938. Statistical tables for Biological, Agricultural, and Medical Research. Edinburgh.Google Scholar
Garwood, E. J., and Goodyear, E., 1924. The Lower Carboniferous Succession in the Settle District and along the line of the Craven Faults. Quart. Journ. Geol. Soc., lxxx, 184.CrossRefGoogle Scholar
Kermack, K. A., and Haldane, J. B. S., 1950. Organic Correlation and Allometry. Biometrika, xxxvii, 30.CrossRefGoogle Scholar
McCoy, F., 1849. On some new Palaeozoic Echinodermata. Ann. Mag. Nat. Hist., 2, iii, 244.CrossRefGoogle Scholar
McCoy, F. (and Sedgwick, A.). 1851 (1854). Systematic description of the British Palaeozoic Fossils in the Geological Museum of the University of Cambridge. London and Cambridge.Google Scholar
Roemer, C. F., 1851. Monographie der fossilen Crinoidenfamilie der Blastoideen und der Gattung Pentatremites im Besonderen. Wiegmann. Archiv., xvii, 323.Google Scholar