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

Published online by Cambridge University Press:  28 August 2019

Matúš Hyžný
Comenius University, Faculty of Natural Sciences, Department of Geology and Palaeontology, Mlynská dolina, Ilkovičova 6, 842 15Bratislava, Slovakia Naturhistorisches Museum Wien, Burgring 7, 1010Vienna, Austria
Denis Audo*
Yunnan Key Laboratory for Palaeobiology, Yunnan University, China MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment, Yunnan University, China
Rodney M. Feldmann
Department of Geology, Kent State University, KentOH44242, USA
Guenter Schweigert
Staatliches Museum für Naturkunde, Rosenstein 1, 70191 Stuttgart, Germany
*Corresponding author


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.

Copyright © 2019, The Paleontological Society

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