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Some new post-Paleozoic sea stars (Asteroidea: Echinodermata) and comments on taxon endurance

Published online by Cambridge University Press:  14 July 2015

Daniel B. Blake*
Affiliation:
Department of Geology, University of Illinois at Urbana-Champaign, 1301 W. Green St., Urbana 61801-2999

Abstract

Five Jurassic through Oligocene sea stars are described; all are assignable to modern genera and two (Tethyaster jurassicus; Mediaster hayi) represent new species. Tethyaster and Pseudarchaster are morphologically similar but represent separate orders; occurrence of both in Jurassic sediments suggests close common ancestry. Many post-Paleozoic sea stars appear enduring, perhaps because of broad ecological tolerances and construction; the fossils described here probably are not unique as asteroid living fossils.

Type
Research Article
Copyright
Copyright © The Paleontological Society 

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