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1 January 2009 The Complex Morphology of a New Lower Silurian Asteroid (Echinodermata)
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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.

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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