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Tricarina gadvanensis is an isopod: reinterpretation of an alleged lobster from the Lower Cretaceous of Iran

Abstract : Abstract An incomplete arthropod fossil, Tricarina gadvanensis Feldmann et al., 2007, from the Lower Cretaceous (Barremian–Aptian) of Iran, originally interpreted as a lobster (Malacostraca, Eucarida, Decapoda), is reinterpreted herein as a representative of a seroloid isopod crustacean (Malacostraca, Peracarida, Isopoda). The body orientation of the fossil is reversed, and the alleged cephalothoracic shield is reinterpreted as being the pleotelson. Tricarina gadvanensis , with its unique configuration of pleonite fusion (pleonites 1–4 are free, whereas pleonite 5, with still visible epimera, is fused with the pleotelson), is suggested to represent a close relative of Serolidae. The preservation of T. gadvanensis in deepwater shales speaks for conservativeness in environmental preferences of seroloid isopods for at least 125 million years.
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Submitted on : Thursday, October 20, 2022 - 1:44:19 PM
Last modification on : Friday, October 21, 2022 - 4:02:44 AM

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Matúš Hyžný, Denis Audo, Rodney Feldmann, Guenter Schweigert. Tricarina gadvanensis is an isopod: reinterpretation of an alleged lobster from the Lower Cretaceous of Iran. Journal of Paleontology, 2020, 94 (2), pp.304-310. ⟨10.1017/jpa.2019.61⟩. ⟨mnhn-03822539⟩

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