Two new Paleozoic Asteroidea (Echinodermata) and their taxonomic and evolutionary significance

Daniel B. Blake, Joseph Koniecki

Research output: Contribution to journalArticlepeer-review


Sertulaster keslingi new genus new species (Palaeasteridae) and Delicaster hotchkissi new species (Permasteridae) are asteroid echinoderms described, respectively, from the Ordovician and Carboniferous of eastern North America. The new genus and species help to document diversity within taxa of lower rank. S. keslingi is similar to the Early Ordovician Eriaster Blake and Guensburg, 2005 but exhibits less differentiation of the skeletal elements from beyond the ambulacral column, that of the so-called extraxial skeleton, whereas the comparatively robust construction of Delicaster hotchkissi clearly departs from that of the type species, D. enigmaticus (Kesling, 1967). Small sample sizes and incomplete exposure of available specimens illustrate ambiguities typically encountered in the study of fossil asteroids.

Original languageEnglish (US)
Pages (from-to)105-114
Number of pages10
JournalJournal of Paleontology
Issue number1
StatePublished - Jan 1 2019

ASJC Scopus subject areas

  • Palaeontology


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