Retropluma slovenica sp. nov. A, dorsal carapace of the holotype (RGA/SMNH 1203). B, dorsal carapace of the paratype (RGA/SMNH 0554), showing preserved rostrum. C, complete dorsal carapace of the paratype (RGA/SMNH 0642). D, complete dorsal carapace of the paratype (RGA/SMNH 0705) with good lateral and posterior details. E, complete male specimen (RGA/SMNH 0674) showing venter, chelipeds P2–P5 (with reduced P5). F, male specimen (RGA/SMNH 0673) showing venter. G, female specimen (RGA/SMNH 0318) showing venter. H, chelipeds of a male specimen RGA/SMNH 0659. I, significantly reduced P5 (arrow) of the specimen RGA/SMNH 0290. J, anterolateral margin of the specimen (RGA/SMNH 0705) showing serrated edge (arrow). K, anterolateral margin of the specimen RGA/SMNH 1203 showing preserved infraorbital tooth (arrow). L, lateral margin of the specimen (RGA/SMNH 1203) showing preserved lateral teeth on contacts with carinae (arrows). Specimens A–J were whitened with ammonium chloride prior to photography. All scale bars represent 5 mm.