AN EARLY MIOCENE DEEP - WATER DECAPOD CRUSTACEAN FAUNULE FROM THE VIENNA BASIN (WESTERN CARPATHIANS, SLOVAKIA)

A decapod crustacean faunule from the lower Miocene (upper Burdigalian, 'Karpatian') of the Slovakian part of the Vienna Basin comprise five new species: Callianopsis marianae (Ctenochelidae), Crosniera schweitzerae (Thomassiniidae), Agononida cerovensis and Munidopsis lieskovensis (both Galatheidae) plus Mursia harnicari (Calappidae). The new species of Callianopsis is the first undoubted member of the genus to be recorded from Europe; it is based on sexually dimorphic major and minor chelae as well as on portions of carapace and abdomen. Crosniera schweitzerae sp. nov. and Agononida cerovensis sp. nov. constitute the first fossil members of these genera. Additional material of an enigmatic crab, Styrioplax exiguus, and a re-examination of the type material, confirms assignment of that genus to the subfamily Rhizopinae (family Pilumnidae). Palaeoecological data suggest that deposition of the levels (Laksarska Nova Ves Formation) from which these taxa were collected took place under generally low-energy, deep-water conditions that were conducive to the preservation of delicate structures. Palaeobiogeographical affinities of the described taxa suggest a trans-Atlantic migration during the early Miocene.