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17 March 2020 Tricarina gadvanensis is an isopod: reinterpretation of an alleged lobster from the Lower Cretaceous of Iran
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Abstract

An incomplete arthropod fossil, Tricarina gadvanensisFeldmann 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.

Copyright © 2019, The Paleontological Society
Matúš Hyžný, Denis Audo, Rodney M. Feldmann, and Guenter Schweigert "Tricarina gadvanensis is an isopod: reinterpretation of an alleged lobster from the Lower Cretaceous of Iran," Journal of Paleontology 94(2), 304-310, (17 March 2020). https://doi.org/10.1017/jpa.2019.61
Accepted: 17 July 2019; Published: 17 March 2020
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