Abstract
ABSTRACT Acanthospondylus pennsylvanicus, new genus and species, is described and illustrated on the basis of a single specimen from the Conemaugh Group (Late Pennsylvanian) of western Pennsylvania. Distribution and morphology of ossicles similar to those of Eospondylus primigenius Sturtz, 1886, from the Early Devonian of Germany, including the absence of radial shields, dorsal and ventral arm plates, and the relatively wide separation of laterals over the ambulacral groove, indicates that Acanthospondylus belongs to the family Eospondylidae (Oegophiurida, Zeugophiurina) along with Eospondylus Gregory, 1897, and Kentrospondylus Lehmann, 1957. This extends the range of Eospondylidae from Early Devonian (Siegenian and Emsian) to Late Pennsylvanian (Early Kasimovian [Missourian]).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
