Astérozoaires (Echinodermata) nouveaux du Paléozoïque inférieur du Massif armoricain, France, et de l'Ouest des États-Unis

Translated title of the contribution: New Early Paleozoic Asterozoa (Echinodermata) from the Armorican Massif, France, and the Western United States

Daniel B. Blake, Thomas E. Guensburg, Bertrand Lefebvre

Research output: Contribution to journalArticlepeer-review

Abstract

Seventeen specimens representing three of the four asterozoan classes (Stenuroidea, Asteroidea, Ophiuroidea) are recorded from Ordovician and Silurian strata of the western United States and northwest France; only the Somasteroidea is not represented. New taxa are: the stenuroids Lopidiaster jamisoni nov. gen. and sp. and Lehmannaster spinosus nov. gen. and sp.; the asteroids Meturaster belli nov. gen. and sp., Petraster crozonensis nov. sp., and Schuchertia sprinklei, nov. sp.; Lepidactis? sp. also is recognized. The Ophiuroidea is represented by Stenaster sp., Protaster sp., and an arm tip is of unknown familial and generic affinities. Class level assignments of all specimens are clear, and all but Lopidiaster are similar to earlier-known representatives of their respective classes; phylogenetic differentiation within the subphylum was well-established early in the Paleozoic. Ordovician asterozoans are both geographically widely distributed and morphologically clearly separable from modern asterozoans, yet overall structural similarities favor ecologic roles paralleling those known today.

Translated title of the contributionNew Early Paleozoic Asterozoa (Echinodermata) from the Armorican Massif, France, and the Western United States
Original languageFrench
Pages (from-to)161-181
Number of pages21
JournalAnnales de Paleontologie
Volume102
Issue number3
DOIs
StatePublished - Jul 1 2016

Keywords

  • Asteroidea
  • Echinodermata
  • France
  • Paleozoic
  • United States

ASJC Scopus subject areas

  • Palaeontology

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