(Odhner, 1925)
Carapace transversely ovoid; c. 1.38-1.44 times broader than long. Fronto-orbital width c. 0.75-0.8 times carapace length. Carapace convex anteriorly, flat from side to side across postero-branchial regions. Regions well defined, separated by smooth grooves; 1F and 2F fused; 1M moderately large, triangular, separated from 2M; 2M large, broad not subdivided; 3M entire, medial prolongation narrow, reaching nearly to anterior end of 1M; 4M distinguishable; 1L, 2L and 3L fused into single, broad region; 4L separated anteriorly from 1L-3L by a shallow groove, fused with 5L laterally; 6L poorly separated from 5L; 1P broad, poorly delimited laterally; 2P also poorly defined, but with ridges slightly raised laterally above posterior margin. Antero-lateral margins regularly convex, granular; with three low teeth behind the exorbital angle; not strongly projecting; first tooth about half-way back along antero-lateral margin; in front of first tooth and lateral to orbit, margin rounded, not defined; second and third teeth evenly spaced, slightly more prominent than first; greatest carapace width between second pair of teeth; postero-lateral margins convergent, straight. Front c. 0.29-0.33 times carapace width; 0.56-0.6 times fronto-orbital width; bilobed, margins acutely granular; lateral angles formed by acute large granules. Posterior margin c. 0.35-0.37 times carapace width. Carapace surface covered in rounded granules, except in grooves separating regions; larger anteriorly, minute posteriorly; more acute towards margins, especially on smaller specimens; without setae. Upper orbital border evenly granular; concave; orbital fissures obsolete. Lower orbital border irregularly granular. Inner angle of lower orbital border formed by a triangular tooth; lateral edge of orbit without a notch. Antennal flagellum entering orbit, filamentous, reaching just beyond outer orbital margin. Basal antennal segment just touching front. Basal antennular segment with row of granules along anterior margin and a short row antero-laterally; palp folds obliquely, first segment moderately long, armed with small sharp granules on outer face; interantennular septum triangular; superior margins of epistome below antennules with a row of granules, inferior margin projecting.
Third maxilliped: merus of third maxilliped distinctly shorter than ischium. Merus c. 0.7 times wider than long; antero-external angle produced, strongly angled, rounded; 0.5-0.6 times length of ischium. Ischium sub-rectangular, length c. 1.3-1.5 times width; inner margin granular.
Chelipeds subequal; large and robust, height of palm c. 0.55 times length including fixed finger; merus with posterior border granulate, with broad subdistal lobe; lower border angle, connected by an oblique crest to a small ventral tubercle; inner margin granular; upper and outer surfaces covered with conical granules. Outer surface of palm with coarse conical granules. Outer surface of palm without setae. Inner surface of palm sparsely granular, most granules minute, smooth, small patch of larger granules medially. Immovable finger with ventral granular ridge; moderately short. Length cutting edge c. 0.34 times length propodus. Ventral border of chela more-or-less concave at base of fixed finger. Dorsal surface of dactyl granular. Fingers pointed; a narrow gape between cutting margins basally.
Ambulatory legs of medium length; compressed; slender; first and second pairs sub-equal and longer than others, very slightly longer than third pair. Longest leg c. 1.2 times maximum carapace width. Merus of third leg c. 2.9-3.3 times as long as wide. Carpus c. 2-2.3 times as long as wide. Propodus c. 1.6-1.9 times as long as wide. Dactyli c. 1.4-1.5 times length of propodus. Dactyli slender and straight; terminating in an acute chitinous recurved tip. Merus of anterior margin terminating in a pronounced blunt tooth. Superior margins of meri with row of bluntly acute, distally pointed tubercles, appearing serrated; inferior margins granular, particularly on anterior legs; carpi and propodi with enlarged, coarse, bluntly acute tubercles on superior margins, reducing in size across upper face, more-or-less arranged in rows; bearing scattered setae on margins, and forming a conspicuous row on distal inferior margins of propodi and on upper and lower margins of dactyli.
Male abdomen relatively narrow; five free segments; third to fifth fused; first segment subequal in width to third. First segment narrow. Segments three-five tapering. Segment six c. 1.2-1.3 times wider than long. Telson longer than segment 6; triangular, rounded apically, about as long as wide at base.
Gonopods: G1 long, reaching well past suture between sternites 4 and 5; slender; curved. Setae present; row of long setae on dorsal margin near tip; minute conical setae along dorsal margin over distal half, and on ventral margin near tip; tip pointed, hollowed, gonopore opening subterminally. G2 short; evenly curved; tip short, reflexed, pointed.
Sternum smooth, punctate; with short, deep cleft medially on sternite 4, just behind line of fusion with sternite 3. (Davie, 1992)
Type locality: Kepulauan Kai, Indonesia, 5°37.10'S, 132°23'E, 245 m.
Range: ? Japan - Tosa Bay (Sakai, 1976a); Taiwan; Indonesia - Kepulauan Kai (Odhner, 1925, Guinot, 1976); Loyalty Island (Davie, 1997); Marquesas Islands - (Davie, 1993), Fatu Hiva (Poupin, 1996a); Society Islands - Iles Sous le Vent (Davie, 1993), Mopelia (Poupin, 1996a); Tuamotu Archipelago - Akiaki and Mururoa (Davie, 1993, Poupin, 1996a); 200-370 m.