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The Structure of the Plastron of the Echinoid Somaliaster Hawkins

Published online by Cambridge University Press:  01 May 2009

Kenneth A. Joysey
Kenneth A. Joysey
Affiliation:
Sedgwick Museum, Cambridge.
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Abstract

Previous descriptions of the plastron of Somaliaster Hawkins have been conflicting and, in consequence, there has been some doubt regarding the systematic position of this genus. The type-material has been re-examined and the plastron found to be meridosternous. Somaliaster is here referred to the family Stenonasteridae, where it has close affinities with Iraniaster Cotteau and Gauthier.

Type
Articles
Information
Geological Magazine , Volume 91 , Issue 1 , February 1954 , pp. 45 - 48
Copyright
Copyright © Cambridge University Press 1954

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References

REFERENCES

Cotteau, G., and Gauthier, V., 1895. In de Morgan, Mission scientifique en Perse ii, 1, Échinides fossiles, p. 26.Google Scholar
Cotteau, G., and Gauthier, V., 1902. Mission scientifique en Perse, iii. 3, Échinides supplement, p. 125.Google Scholar
Hawkins, H. L., 1935. Cretaceous Echinoids. Geology and Palaeontology of British Somaliland. Part II, 47–56.Google Scholar
Maccagno, A. M., 1941. Osservazioni sul Genere Somaliaster Haw. Boll. Soc. Geol. Ital., lx, 89–98.Google Scholar
Mortensen, T., 1950. A Monograph of the Echinoidea, v, 1. Copenhagen, 406.Google Scholar