Platytyphlops sarahae n. sp. is described based on specimens collected in the Mar del Plata submarine canyon and on the slope of the Namuncurá-Burdwood Bank. P. sarahae n. sp. is closely related to the Antarctic species Platytyphlops asperus, from which it can be easily separated by the telson having a central distal seta distinctly shorter than the other two. The presence of a rudimentary squama (exopod) on the second antenna of the male is reported for the first time for the family, and for the second time for the order Cumacea. With the aim of improving the taxonomic work and facilitating future phylogenetic analyses in the family Lampropidae, remarks on the second antenna of the male, the eyelobe and the pseudorostrum are presented.

Platytyphlops sarahae ñ。sp。根据在马德普拉塔（Mar del Plata）海底峡谷和Namuncurá-BurdwoodBank的斜坡上收集的标本进行描述。P. sarahae ñ。sp。与南极物种Platytyphlops asperus密切相关，可以很容易地通过具有远端中央中央刚毛明显短于其他两个的telson使其分离。对于该家庭来说，这是第一次报告在雄性的第二个触角上存在一个基本鳞状鳞屑（外足），对于黄瓜花斑目则是第二次报告。为了改善斜纹夜蛾科的分类学工作并促进将来的系统发育分析，在雄性的第二根触角，眼裂和假眉头上作了说明。