Enodicalix (Diploporita, Aristocystitidae): A new echinoderm genus from the Middle Ordovician of Spain

Authors

  • C.R.C. Paul School of Earth Sciences, University of Bristol Bristol, BS8 1RJ, UK https://orcid.org/0000-0003-3670-3325
  • J.C. Gutiérrez-Marco Instituto de Geociencias (CSIC, UCM), and Departamento de Geodinámica, Estratigrafía y Paleontología, Facultad CC. Geológicas José Antonio Novais 12, E-28040 Madrid, Spain

DOI:

https://doi.org/10.1344/GeologicaActa2020.18.3

Keywords:

Echinodermata, Diploporita, New taxa, Darriwilian, Montes de Toledo

Abstract

Restudy of an Ordovician diploporite specimen from the Middle Ordovician of central Spain reveals that the species ‘Calix’ inornatus MELÉNDEZ has four ambulacra, each with two equal facets, an oval hydropore and a smooth thecal surface. In contrast, the type species of Calix has four ambulacra, each with four facets added in a clockwise direction during growth, a trilobed hydropore, and a theca with spiny plates. Other aristocystitid genera with four ambulacra have one facet per ambulacrum. ‘Calix’ inornatus differs from all other aristocystitid genera and warrants a new generic name, for which we propose Enodicalix

Author Biographies

C.R.C. Paul, School of Earth Sciences, University of Bristol Bristol, BS8 1RJ, UK

School of Earth Sciences Honorary Research Fellow

J.C. Gutiérrez-Marco, Instituto de Geociencias (CSIC, UCM), and Departamento de Geodinámica, Estratigrafía y Paleontología, Facultad CC. Geológicas José Antonio Novais 12, E-28040 Madrid, Spain

Professor

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Published

2020-02-07

How to Cite

1.
Paul C, Gutiérrez-Marco J. Enodicalix (Diploporita, Aristocystitidae): A new echinoderm genus from the Middle Ordovician of Spain. GeA [Internet]. 2020Feb.7 [cited 2021Jul.30];18:1-8. Available from: https://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2020.18.3

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