Bioacoustics of Xenocrate

Diagnosis. Carapace subhexagonal; dorsal surface granular, regions poorly demarcated ( Fig. 1 AB); front lamellar, truncate, marked by distinct median notch ( Fig. 1 B); anterolateral margins with 2 teeth ( Fig. 1 A, B); basal antennal article short, closed by extension of carapace margin ( Fig. 1 C); posterior margin of epistome strongly lobulated ( Fig. 1 C); merus of third maxilliped auriculiform ( Fig. 2 A); no visible stridulating structures. Sterno-abdominal cavity of male reaching anterior margin of sternite 4 ( Figs. 2 B, 3A); press-button of abdomen-locking mechanism on anterior edge of thoracic sternite 5 ( Fig. 3 A); thoracic suture 2/3 deep; suture 3/4 shallow, medially interrupted; sutures 4/5, 6/7, 7/8 interrupted medially, 5/6 complete ( Figs. 2 B, 3A); male episternite 7 covering part of sternite 8 and coxa of P5; sternite 8 not visible when abdomen closed ( Fig. 2 C, D); penis coxo-sternal ( Fig. 3 C). Chelipeds relatively stout, long ( Fig. 1 A); P2–P5 long, slender; margins of dactylus and propodus setose. Male abdomen elongated, transversely narrow ( Fig. 2 B, C); somite 1 very narrow longitudinally, partially covered by posterior carapace margin ( Fig. 3 C, D). G1 very slender, with numerous denticles of varying sizes on distal half (Fig. 4A–C); G2 short, less than 1/3 G1 (Fig. 4D). Female abdomen relatively narrow, leaving distal portion of all thoracic sternites visible ( Fig. 5 B); vulva prominent but operculum absent ( Fig. 5 C).