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New Triassic Aviculopectinoidea (Bivalvia), with notes on the taxonomic concept of the superfamily

Published online by Cambridge University Press:  09 October 2020

Michael Hautmann
Affiliation:
Paläontologisches Institut und Museum, University of Zurich, Karl-Schmid Strasse 4, 8006Zurich, Switzerland
Evelyn Friesenbichler
Affiliation:
Paläontologisches Institut und Museum, University of Zurich, Karl-Schmid Strasse 4, 8006Zurich, Switzerland
Eugen Grădinaru
Affiliation:
Department of Geology, Faculty of Geology & Geophysics, University of Bucharest, Bd. Bălcescu Nicolae 1, RO-010041, Bucharest, Romania
Romain Jattiot
Affiliation:
Geowissenschaftliche Sammlung, Universität Bremen, Leobener Strasse 8, 28359Bremen, Germany
Hugo Bucher
Affiliation:
Paläontologisches Institut und Museum, University of Zurich, Karl-Schmid Strasse 4, 8006Zurich, Switzerland

Abstract

We describe two new genera of Triassic Aviculopectinoidea: Cristaflabellum n. gen., which is biconvex and has a strongly plicate shell, and Globodiscus n. gen., which is equiconvex and externally smooth or nearly so. Globodiscus contains the new species G. kiliani n. gen. n. sp. and G. vinzenti n. gen. n. sp. In order to make the taxonomic concept of the superfamily Aviculopectinoidea more consistent with that of its sister group Pectinoidea (scallops), we use tribes rather than families or subfamilies for accommodating the new taxa. Cristaflabellum is placed in the tribe Antijanirini (previously family Antijaniridae), whereas Globodiscus is made the type genus of the new tribe Globodiscini. Both tribes are placed within the family Aviculopectinidae, which is revised to include both equiconvex and inequiconvex taxa. We suggest that tribes are a more appropriate taxonomic rank for many of the previously erected species-poor families and subfamilies of Aviculopectinoidea.

UUID: http://zoobank.org/d143663a-9016-459f-8e24-660102adcf6a

Type
Articles
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press on behalf of The Paleontological Society

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