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Asteroids (Echinodermata) from the Barremian (Lower Cretaceous) of the Agadir Basin, west Morocco

Published online by Cambridge University Press:  11 June 2020

Timothy A. M. Ewin Open the ORCID record for Timothy A. M. Ewin [Opens in a new window]  and
Andrew S. Gale
Timothy A. M. Ewin
Affiliation:
Department of Earth Sciences, The Natural History Museum, Cromwell Road, South Kensington, London, SW7 5BD, United Kingdom: t.ewin@nhm.ac.uk
Andrew S. Gale
Affiliation:
School of Earth and Environmental Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth, PO1 3QL, United Kingdom: andy.gale@port.ac.uk
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Abstract

Abundant new material of articulated asteroids from the Taba Starfish Bed (Lower Cretaceous, Barremian) of the Agadir Basin, western Morocco, allows reappraisal of this important fauna, and the recognition, to date, of five taxa belonging to the Astropectinidae, Odontasteridae, Goniasterididae, Terminasteridae, and Asteriidae. Betelgeusia orientalis Blake and Reboul, 2011 is shown to be a junior synonym of Coulonia platyspina Hess and Blake, 1995, and Dipsacaster africanus Blake and Reboul, 2011 comprises material of C. platyspina and a new odontasterid, here described as Odontaster tabaensis n. sp. Alkaidia megaungula n. sp. is described and its ontogeny and affinities discussed. From this, it is concluded that the Terminasteridae, revised to include the genera Terminaster and Alkaidia, is sister taxon to the extant family Zoroasteridae, and both are placed in the suborder Zorocallina of the Forcipulatida. The Taba fauna is a representative of a distinctive Lower Cretaceous asteroid assemblage that existed in northern Tethys from the Barremian to the Cenomanian and is also well known from the Albian and lower Cenomanian of Texas.

UUID: http://zoobank.org/b2ecdd06-685d-4242-9e49-985f9d7a3cc1

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Articles
Information
Journal of Paleontology , Volume 94 , Issue 5 , September 2020 , pp. 931 - 954
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Copyright © 2020, The Paleontological Society

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