Metapenaeus lysianassa

Distomedian petasma projection with fully developed or vestigeal apical filament
Thelycum of impregnated female usually with white conjoined pads
Rostrum wide and short, not reaching to distal end of basal antennular segment
Thelycum with ovoid anterior and lateral plates of subequal size
Apical filaments of petasma vestigial, represented by a pair of rounded bosses