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Growth Stages in some Species of Promicroceras

Published online by Cambridge University Press:  01 May 2009

Ethel D. Currie
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Extract

In a recent study of the growth stages of Promicroceras marstonense (Currie, 1942), it was shown that apart from slight individual variations, the growth-ratios exhibited changes at certain stages, which are characteristic of the species. A similar investigation has now been carried out with material representing other species of Promicroceras, in order to ascertain how far there is general agreement within the genus and the extent to which any differences are typical of the various species studied.

Type
Articles
Information
Geological Magazine , Volume 80 , Issue 1 , February 1943 , pp. 15 - 22
Copyright
Copyright © Cambridge University Press 1943

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References

REFERENCES TO LITERATURE

Bodylevsky, V., 1926. The development of Cadoceras elatmae Nik. Ann. Soc. Paléont. Russie, v, i (1925), 61–94.Google Scholar
Currie, E. D., 1942. Growth Stages in the Ammonite Promicroceras marstonense Spath. Proc. Roy. Soc. Edin., B, lxi, 344–367.Google Scholar
Lang, W. D., and Spath, L. F., 1926. The Black Marl of Black Ven and Stonebarrow. Quart. Journ. Geol. Soc., lxxxii, 144–187.Google Scholar
Trueman, A. E., 1941. The Ammonite Body-chamber, with special reference to the Buoyancy and Mode of Life of the Living Ammonite. Quart. Journ. Geol. Soc., xcvi, 339–383.Google Scholar