Graptocarcininae n. subfam., an extinct subfamily of Dynomenidae Ortmann, 1892 (Crustacea, Brachyura, Podotremata)

Barry W. M. Van Bakel (The Netherlands), Danièle Guinot, José Carmelo Corral, Pedro Artal

Abstract


Newly available material of a dynomenid crab, Graptocarcinus urbasaensis n. sp., from the Upper Cretaceous of northernSpain (Álava and Navarra), allowed the study of the morphology of well preserved ventral surfaces. We describe a newsubfamily of Dynomenidae, comprising the middle-Upper Cretaceous Graptocarcinus and the Upper Jurassic Cyclothy-reus. Graptocarcininae n. subfam. shows a primitive configuration of the abdomen and an abdominal holding mechanismthat is similar to that of the Acanthodromiinae. Recognition of this ancient extinct subfamily confirms that the Dynomenidae is amongst the most basal brachyuran families.

Keywords


Crustacea; Decapoda; Brachyura; Dynomenidae; Acanthodromiinae; <i>Graptocarcinus</i>; <i>Cyclothyreus</i>; fossil crab; new subfamily; new species

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ISSN 1175-5326 (Print Edition) & ISSN 1175-5334 (Online Edition)
Published by Magnolia Press, Auckland, New Zealand