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 Australocarcinus kanaka Davie & Guinot, 1996 ( Figs. 93 C; 94B, H; 95C, D; 96C, D; 98C, D; 99C, D) Australocarcinus kanaka Davie & Guinot, 1996 : 279 , figs. 1‒4, 6, 8 [ type locality: New Caledonia ] .—Ng et al. 2008: 76 [in list], 77, fig. 60 [colour] [New Caledonia].— Anger et al. 2015 : 329 . Type material . Holotype male (11.1 × 9.5 mm ) (MNHN-IU-2014-12818, ex MNHN-B25279), New Caledonia , Col d'Amoss , near Ouégoa , in freshwater stream, l00 m altitude, R. Raven coll., 13.11.1993 . Paratypes: 2 females (9.2 × 11.2 mm , 10.4 × 12.4 mm ) (MNHN-IU-2014-12819, ex MNHN-B25280), rivière Pangou, P. Bouchet coll., 300 m altitude, 13.07.1993 —1 male (7.3 × 8.7 mm ) (MNHN-IU-2014-12820, ex MNHN-B25281), rivière Oualème, Ouène, P. Bouchet coll., 14.07.1993 .—1 male, 2 females, 1 juvenile (MNHN- IU-2014-12821, ex MNHN-B25282), Koumac, Three Creeks, 1993). Other paratypes (5 males, 3 females) (see Davie and Guinot, 1996 ). Other material examined . New Caledonia . 2 females (7.4 × 8.5 mm , 8.5 × 9.8 mm ) ( ZRC 2009.111 ), Koumac, northern New Caledonia, P.K.L. Ng coll., 11.2006. Diagnosis . Carapace ( Fig. 93 C; Davie & Guinot 1996 : figs. 1, 3A) subquadrate, 11.2 wider than long; front bilobed, with slight median cleft; dorsal surface smooth. Anterolateral margins arcuate, with 3 wide, short, dorsoventrally flattened teeth. Orbits short. Eye peduncle short ( Fig. 94 B; Davie & Guinot 1996 : fig. 3A), does not fill orbit, mobile, cornea enlarged, pigmented. Epistome ( Fig. 94 B) compressed, posterior margin with median lobe with fissure, circular lateral margins without fissures. Third maxillipeds ( Fig. 94 H; Davie & Guinot 1996 : fig. 3C) leaving gap when closed; merus quadrate, auricular anteroexternal angle, ischium quadrate, slightly longer than merus. Chelipeds ( Figs. 93 C; 95C, D; Davie & Guinot 1996 : figs. 1; 3F) subequal in length, nearly similar in both sexes; cutting margins of both chelae with broad, shallow teeth larger in major chela. Inner margin of cheliped carpus with short, triangular tooth. Ventral surface of cheliped merus bordered by large tubercles. Proportionally short ambulatory legs ( Fig. 93 C; Davie & Guinot 1996 : fig. 1), P5 merus not reaching front when folded. Meri smooth. Fused thoracic sternites 1, 2 semicircular, proportionally wide, short. Male pleon ( Fig. 96 C; Davie & Guinot 1996 : fig. 3D, E) with lateral margins of somite 6, fused somites 3–5 slightly convex; postero-lateral regions slightly swollen; telson proportionally long; “supplementary plate” ( Fig. 96 D; Davie & Guinot 1996 : fig. 3G) conspicuously narrow, short, rectangular. G1 ( Fig. 98 C; Davie & Guinot 1996 : fig. 4A) stout, distal part with tapering tip, with short spinules. G2 ( Fig. 98 D; Davie & Guinot 1996 : fig. 4B) longer than G1, basal segment curved; distal segment slightly longer than basal segment, apex with lateral pointed tip. Somites of female pleon ( Fig. 99 C) with slightly convex lateral margins; telson proportionally long. Sterno-pleonal cavity of female ( Fig. 99 D) moderately deep, with conspicuously large vulvae widely separated, covering most of thoracic sternite 5 with anterior portion extending into deflected suture 5/6, round, thin lip on outer margin, soft membrane across, leaving proportionally small opening. FIGURE 73. Gonopods of species of Angustopelta n. gen. A, A. aurita , Philippines: male 7.7 × 9.5 mm (ZRC 2015.248); B‒E, A. aurita , Philippines: male 9.6 × 11.2 mm (ZRC 2015.250); F‒H, A. cribrorum , Japan: holotype male 13.6 × 14.9 mm (USNM 46388); I, A. cribrorum , Taiwan: male 9.9 × 11.6 mm (ZRC 2015.214). A, B, F, ventral view of left G1; C, D, G, H, distal part of left G1; E, I, left G2. Scales: A, B, E, F, I = 0.5 mm; C, D, G, H = 0.1 mm. FIGURE 74. Gonopods of species of Angustopelta n. gen. A, C‒E, A. robusta n. sp. , Vanuatu: holotype male 9.3 × 10.7 mm (MNHN-IU-2010-5616); B, A. robusta n. sp. , Vanuatu: paratype male 12.3 × 13.3 mm (ZRC 2015.255); F‒I, A. modesta n. sp. , Solomon Islands: holotype male 13.3 × 15.1 mm (MNHU-IU-2013-9038). A, B, F, ventral view of left G1; C, D, G, H, distal part of left G1; E, I, left G2. Scales: A, B, E, F, I = 0.5 mm; C, D, G, H = 0.1 mm. FIGURE 75. Gonopods of species of Chinommatia n. gen. A‒D, C. cavimanus , Philippines: male 10.1 × 12.2 mm (ZRC 2015.228); E‒H, C. bruuni , Java Sea: male 3.4 × 4.0 mm (ZMUC CRU-1524); I, C. bruuni , Malaysia: male 4.3 × 5.5 mm (ZRC 2013.0020); J‒M, C. bicuspida n. sp. , Papua New Guinea: holotype male 10.7 × 12.9 mm (MNHN-IU-2011-0954). A, E, I, J, ventral view of left G1; B, F, K, ventral view of distal part of left G1; C, G, L, dorsal view of distal part of left G1; D, H, M, left G2. Scales: A, D, E, H, I, J, M = 0.5 mm; B, C, F, G, K, L = 0.1 mm. FIGURE 76. Gonopods of species of Chinommatia n. gen. and Notopelta n. gen. A‒E, Chinommatia turpis n. sp. , Vanuatu: holotype male 3.1 × 4.3 mm (MNHU-IU-2013-9044); F‒I, Notopelta mortenseni , Sunda Strait : holotype male 5.0 × 6.9 mm (ZMUC CRU-7397). A, F, ventral view of left G1; B, G, ventral view of distal part of left G1; C, H, dorsal view of distal part of left G1; D, left G2 (tip damaged); I, left G2; E, right G2. Scales: F–I = 0.5 mm; A‒H = 0.1 mm. FIGURE 77. Gonopods of species of Statommatia n. gen. A‒D, S. apta , Philippines: male 5.9 × 7.1 mm (ZRC 2015.239); E‒H, S. knudseni , New Caledonia: holotype male 4.7 × 6.9 mm (ZMUC CRU-6974); I‒L, S. malagasy n. sp. , Madagascar: holotype male 9.9 × 12.4 mm (MNHN-IU-2010-4370a). A‒C, ventral view of right G1 [left one damaged]; E, I, ventral view of left G1; B, dorsal view of distal part of right G1; C, ventral view of distal part of right G1; F, J, ventral view of distal part of left G1; G, K, dorsal view of distal part of left G1; D, H, L, left G2. Scales: A, D, E, H, I, L = 0.5 mm; B, C, F, G, J, K = 0.1 mm. FIGURE 78. Gonopods of species of Statommatia n. gen. A, B, S. pubescens , South China Sea: holotype male 5.0 × 7.9 mm (after Chen 1998: fig. 23-7); C‒G, S. granulosa n. sp. , New Caledonia: holotype male 4.1 × 4.7 mm (MNHN-IU-2013-9454). A, C, ventral view of left G1; D, dorsal view of left G1; B, E, ventral view of distal part of left G1; F, dorsal view of distal part of left G1; G, left G2. Scales = 0.1 mm. FIGURE 79. Gonopods of species of Tenagopelta n. gen. A‒E, T. pacifica n. sp. , Philippines: paratype male 10.2 × 11.4 mm (ZRC 2015.212); F‒J, T. brachyphallus n. sp. , Australia: holotype male 6.1 × 6.9 mm (NMV J61680 ); K‒N, T. potens , Papua New Guinea: male 11.8 × 13.8 mm (MNHN-IU-2011-1504). A, F, K, ventral view of left G1; B, G, L, dorsal view of left G1; C, H, M, ventral view of distal part of left G1; D, I, N, dorsal view of distal part of left G1; E, J, O, left G2. Scales: A, B, E, F, G, J, K, L, O = 0.5 mm; C, D, H, I, M, N = 0.1 mm. FIGURE 80. Third maxilliped and male pleon of species of Microtopsis . A, B, M. takedai , Japan: holotype male 2.4 × 3.1 mm (after Komai et al . 2012: figs. 3A, 2H, respectively); C, D, F, M. teschi n. sp. , Indonesia: holotype male 1.5 × 2.1 mm (NNM- ZMA); E, M. teschi n. sp. , Indonesia: paratype 1.5 × 1.9 mm (NNM-ZMA). A, left third maxilliped; B, F, male pleon; C, right third maxilliped (denuded, exopod not drawn); D, left third maxilliped (denuded, exopod not drawn); E, right third maxilliped (denuded). Scales = 0.5 mm. Remarks . The posterior margin of the epistome of the holotype male (MNHN-IU-2014-12818, ex MNHN- B25279) consists of a straight median lobe with no median fissure and straight lateral margins. The epistome, however, has a semicircular median lobe with a median fissure in a female (MNHN-IU-2014-12819, ex MNHN- B25280). It is short, with straight lateral margins and without a lower margin in both specimens. Distribution . Known only from New Caledonia ; rivers.