Selatium Serène & Soh, 1970

Type species. Sesarma brockii De Man, 1887, by original designation; gender neuter.

Diagnosis. Carapace quadrate to longitudinally rectangular, lateral margins parallel to subparallel or gently divergent posteriorly; lateral margins of carapace with 1 distinct epibranchial tooth or almost entire; regions of carapace well defined by distinct grooves; frontal margin strongly deflexed; anterior frontal lobes prominent, posterior frontal lobes weakly demarcated; antennae entering orbits; basal segments of antennae, antennules mobile, not separated by a septum; Verwey’s groove (see Abele, 1992) delimited by dorsal and ventral rows of setae. Exopod of third maxilliped with long flagellum. Cheliped merus with expanded foliaceous distal margin, lined with prominent sharp spines and teeth. Chelae with stridulating structure: dorsal margin of palm with 1 longitudinal crest of tubercles, partly pectinated, with 33–37 teeth in males; dorsal margin of dactylus with ca. 30 dome-shaped tubercles; fingers relatively long, tips of fingers hoofed with sharp cutting edges; inner surface of palm convex, with raised transverse ridge of small or large granules. Ambulatory legs 1–4 relatively short, dactylus about one third length of propodus. Coxae of ambulatory legs 1–3 with short setae around lateral margins, without tufts of long setae on ventral, lateral surfaces; dactylus about one-third length of propodus; propodal-dactylar condyle dactylus large. Thoracic sternal suture 1/2 completely fused; suture 3/ 4 separated by complete suture; sutures 4/5, 5/6, 6/7, 7/8 medially interrupted, separated by wide gap; deep longitudinal median groove present on sternites 7, 8; male sterno-abdominal cavity almost reaching suture of thoracic sternites 3, 4; sternite 8 not visible when male pleon fully closed. Penis proximally calcified, sternal. Male telson slightly longer than wide; all somites free. G1 stout, with sharp, tapering, pectinated tip; G2 short.