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Unusual morphological features in the blastoid genus Pentremites

Published online by Cambridge University Press:  01 May 2009

H. L. Strimple
H. L. Strimple
Affiliation:
The University of Iowa, Iowa City, Iowa 52242, U.S.A.
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Summary

Although a root system has been discussed for the blastoid Pentremites, no cirri have been reported and no photographic illustrations have heretofore been given of the complete animal. Two specimens with complete stems with sporadic cirri along the entire length and distal attachment cirri, and one specimen with a long portion of stem, a few cirri and spiracle covering plates preserved in place, are reported herein. All three specimens are from the Fraileys Formation, Hombergian Stage, Chesterian Series, Upper Mississippian of southern Illinois, U.S.A. (Zone E1, Pendelian Stage, Namurian Series [A], Upper Carboniferous). An eleutherozoic or free life style is postulated.

Type
Articles
Information
Geological Magazine , Volume 114 , Issue 1 , January 1977 , pp. 9 - 13
Copyright
Copyright © Cambridge University Press 1977

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