Revision of the family Chasmocarcinidae Serène, 1964 (Crustacea, Brachyura, Goneplacoidea) Author Ng, Peter K. L. Author Castro, Peter text Zootaxa 2016 4209 1 1 182 journal article 37321 10.11646/zootaxa.4209.1.1 2de5b7bf-3975-458a-b200-07ec69f4e013 1175-5326 272646 849BAB5C-464A-4B4A-A586-5742411EDC01 Camatopsis valida n. sp. ( Figs. 7 G, H; 23H; 39I , J; 51E; 58E; 69G‒K; 90E) Type material . Holotype male (3.6 × 4.9 mm ) (MNHN-IU-2013-9067), Fiji , south of Viti Levu , MUSORSTOM 10, stn DW1362, 18°11.7’S , 178°35.5’E , 80‒89 m , 14.08.1998 . Paratypes . 1 female (3.5 × 4.3 mm ) (MNHN-IU-2013-9467), MUSORSTOM 10, Fiji , Bligh Water , stn CP1323, 17°16.10’S , 177°45.75’E , 143‒173 m , 0 7.08.1998. Diagnosis . Carapace ( Fig. 7 G, H) subtrapezoidal, 1.2‒1.3 wider than long; front bilobed, with shallow median cleft; anterolateral margins arcuate, minutely granular with granules higher along lateral margins, without distinct lobes or teeth. Eye peduncle ( Fig. 23 H) filling orbit, short, slightly mobile; cornea reduced, with reduced pigmentation. Epistome ( Fig. 23 H), semicircular median lobe with deep median fissure, semicircular lateral margins. Third maxilliped ( Fig. 69 G) merus circular, ischium subquadrate, slightly longer than merus. Proportionally short ambulatory legs ( Fig. 7 G, H); P5 merus 0.7 cl. Chelipeds ( Figs. 7 G, H; 39I , J) subequal in length, heteromorphic in males. Major chela of holotype male ( Fig. 39 I) with thick propodus, nearly triangular in dorsal view, cutting margins without distinct teeth except distal end of pollex overlapping dactylus. Minor chela of both sexes ( Fig. 39 J) with cutting margin of pollex having few teeth. Inner margin of cheliped carpus smooth. Fused thoracic sternites 1, 2 ( Fig. 51 E) triangular, proportionally narrow, long. Male pleon ( Figs. 51 E; 58E) with proportionally short telson. G1 ( Fig. 69 H‒J) conspicuously short, stout, distal segment curved outwards with short to long spinules. G2 ( Fig. 69 K) about 3/4 G1 length, slightly curved, slender, short, straight distal segment. Female pleon with lateral margins of somites strongly convex; telson proportionally short. Sterno-pleonal cavity of female ( Fig. 90 E) moderately deep, vulvae relatively close together. Etymology . The name is derived from the Latin validus for “stout” alluding to the relatively stocky G1 of the species. Remarks . In addition to the characteristic G1 and distinctive male chela, the new species can be easily distinguished from C. leptomerus and C. rubida (which are also found in Fiji ) by having a different carapace form: it is proportionately broader, and the gastric and branchial regions are lower and relatively less convex ( Fig. 7 G, H vs. Figs. 6 ; 8A–F). The carapace characters can easily distinguish between females, even if the G1 and cheliped characters cannot be used. Distribution . Known only from Fiji . Depth: 80‒ 173 m .