Aeger crassipes Bronn, 1858 (Crustacea, Decapoda, Penaeidae) from the Carnian of Austria and Italy revisited: implications for taxonomy of fossil penaeoid shrimps.

Aeger crassipes, a penaeid shrimp from the Late Triassic (Carnian) of Cave del Predil (Raibl), Italy and Polzberg, Austria is revisited. Based on the restudied original material of Bronn and Glaessner, the species is considered poorly defined. Moreover, because of lack of important taxo-nomic characters on the preserved fossils the species cannot be assigned confidently on the genus level. We therefore treat it in open nomenclature and simultaneously refuse to suggest possible relationship with a particular genus. The resulting binomen is "Genus? crassipes". Such treatment may be used for fossil penaeoid shrimps of uncertain affinities rather than classifying them in the "catch-all" or "waste-basket" genera. [ABSTRACT FROM AUTHOR]