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Clarification of Nautilus praepompilius Shimansky from the late Eocene of Kazakhstan

Published online by Cambridge University Press:  14 July 2015

W. B. Saunders ,
V. N. Shimansky  and
O. V. Amitrov
W. B. Saunders
Affiliation:
1Department of Geology, Bryn Mawr College, Bryn Mawr, Pennsylvania 19010
V. N. Shimansky
Affiliation:
2Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya 123, 1647 Moscow, Russia
O. V. Amitrov
Affiliation:
2Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya 123, 1647 Moscow, Russia
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Abstract

The discovery of a specimen of Nautilus praepompilius Shimansky, 1957, from the Chegan Formation of Kazakhstan confirms that this species is assignable to Nautilus, and that this extant genus extends back to the late Eocene. It is morphologically closest to Nautilus pompilius Linnaeus. The nepionic constriction shows that the hatching size was ca. 23 mm dia, close to that for Nautilus pompilius (ca. 26 mm dia).

Type
Research Article
Information
Journal of Paleontology , Volume 70 , Issue 4 , July 1996 , pp. 609 - 611
Copyright
Copyright © The Paleontological Society 

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References

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