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The complex morphology of a new Lower Silurian asteroid (Echinodermata)

Published online by Cambridge University Press:  20 May 2016

Daniel B. Blake  and
Frank R. Ettensohn
Daniel B. Blake
Affiliation:
Department of Geology, University of Illinois, Urbana 61801,
Frank R. Ettensohn
Affiliation:
Department of Earth & Environmental Sciences, University of Kentucky, Lexington 40506,
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Abstract

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.

Type
Research Article
Information
Journal of Paleontology , Volume 83 , Issue 1 , January 2009 , pp. 63 - 69
Copyright
Copyright © The Paleontological Society

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