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Journal of Paleontology; January 2009; v. 83; no. 1; p. 63-69; DOI: 10.1666/08-038RR.1
© 2009 Paleontological Society
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ARTICLE

The Complex Morphology of a New Lower Silurian Asteroid (Echinodermata)

Daniel B. Blake1 and Frank R. Ettensohn2

1 Department of Geology, University of Illinois, Urbana 61801, <dblake{at}uiuc.edu>
2 Department of Earth & Environmental Sciences, University of Kentucky, Lexington 40506, <fettens{at}uky.edu>

Gordonaster brassfieldensis is a new genus and species of Asteroidea (Echinodermata) described from the Lower Silurian Brassfield Formation of east-central Kentucky. Tentatively assigned to the poorly understood Palaeasteridae, Gordonaster shares much with Ordovician asteroids, yet it also exhibits apparent homoplasies that presage the post-Paleozoic crown group. Available specimens also indicate that the ontogenetic pattern of ossicular addition seen in the crown group was established during the Paleozoic.






JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
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