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Science 11 June 1976:
Vol. 192. no. 4244, pp. 1137 - 1139
DOI: 10.1126/science.192.4244.1137
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Articles

Fossilized Eggs in a Pennsylvanian Blastoid

STEVEN G. KATZ 1 and JAMES SPRINKLE 1

1 Department of Geological Sciences, University of Texas at Austin, Austin 78712

A single specimen of Pentremites rusticus (Echinodermata, Blastoidea) from the Early Pennsylvanian of Oklahoma has hundreds of apparent eggs in one of its abnormal anal hydrospire groups. This rare occurrence suggests that female blastoids in this sexually dimorphic species had modified their anal hydrospiresfor brooding eggs instead of for normal respiration.

Submitted on February 11, 1976
Revised on March 19, 1976


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Middle Cambrian Arthropod Embryos with Blastomeres.
X. Zhang, X.-g. Zhang, and B. R. Pratt (1994)
Science 266, 637-639
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Science. ISSN 0036-8075 (print), 1095-9203 (online)