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

Daniel B. Blake; Frank R. Ettensohn

doi:10.1666/08-038RR.1

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Daniel B. Blake,¹ Frank R. Ettensohnhttps://orcid.org/0000-0001-7133-2684²

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

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.

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Daniel B. Blake and Frank R. Ettensohn "The Complex Morphology of a New Lower Silurian Asteroid (Echinodermata)," Journal of Paleontology 83(1), 63-69, (1 January 2009). https://doi.org/10.1666/08-038RR.1

Accepted: 1 August 2008; Published: 1 January 2009

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