Trogloplax joliveti Guinot, 1986

Ng, Peter K. L. & Castro, Peter, 2016, Revision of the family Chasmocarcinidae Serène, 1964 (Crustacea, Brachyura, Goneplacoidea), Zootaxa 4209 (1), pp. 1-182 : 134-136

Trogloplax joliveti Guinot, 1986

( Figs. 93 E–H; 94E, F, J; 95G, H; 97; E–J; 98E–J, 99G, H)

Trogloplax joliveti Guinot, 1986: 308 , pls. 1, 2 [type locality: Papua New Guinea]; 1987: 25, pl. 2, fig. H, I; 1988: 22, 30, 39, pl. 4, figs. 15–17.—Ng et al. 2008: 76 [in list].— Guinot et al. 2013: 42, 279, fig. 24A, B.— Davie et al. 2015a: fig. 71-2.31.

Type material. Holotype male (16.0 × 21.0 mm) (MNHN-IU-2014-10457, ex MNHN-B12793), Papua New Guinea, New Britain, Whiteman Range, Kandrian zone, Arrakis cave system, 300 m from entrance, on sandbar of river, 650 m, P. Jolivet coll., 1985.

Other material examined. Papua New Guinea. New Britain , Papua New Guinea, 1 paratype male (20.0 × 27.0 mm), 1 juvenile (5.0 × 8.5 mm) (MNHN-IU-2014-10458, ex MNHN-B12794), same data as holotype; 1 male (15.7 × 18.6 mm) ( ZRC 2015.294 , ex MNHN-IU-2013-13099, ex MNHN-B20136), Whiteman Mts. , Kandrian zone, cave in Arrakis System, Kukumbu hill, Association pyrénénne de Spéléolologie coll., 1987 ; 1 male (15.0 × 17.7 mm), 2 females (11.8 × 13.7 mm, 15.5 × 18.4 mm) (MNHN-IU-2013-13097, ex MNHN-B27890), 1 female (14.1 × 16.8 mm) ( ZRC 2015.295 ), Whiteman Mts. , Kauchian region, Kandrian zone, cave in Arrakis System, 650 m from entrance, Akenatan Gulf, S. Fulcraud coll., 0 8.2001.

Diagnosis. As for genus.

Remarks. Trogloplax joliveti is a freshwater, blind, troglobitic species that is presumed to have evolved from a marine ancestor rather than from a freshwater or terrestrial one ( Guinot 1986: 307). The species has only been recorded from a sand bank bordering freshwater in an inland karst cave in New Britain, Papua New Guinea ( Guinot 1986). A female specimen (MNHN-IU-2013-13097) had a conspicuous sperm plug.

Distribution. Only known from Papua New Guinea (New Britain), inland cave.

Figures

FIGURE 93. Overall dorsal view of species of Australocarcinus and Trogloplax. A, Australocarcinus riparius, Australia: male 8.8 × 10.2 mm (ZRC 2006.167); B, A. riparius, Australia: female 9.0 × 11.3 mm (ZRC 2006.167); C, Australocarcinus kanaka, New Caledonia: female 8.5 × 9.8 mm (ZRC 2009.111); D, Australocarcinus palauensis, Palau: holotype female (5.8 × 7.1 mm) (USNM 277853); E, F, Trogloplax joliveti, New Britain: holotype male 16.0 × 21.0 mm (MNHN-IU- 2014 - 10457) (after Guinot 1986: pl. 1 A, B); G, Trogloplax joliveti, New Britain: male 15.7 × 18.6 mm (ZRC 2015.294); H, Trogloplax joliveti, New Britain: female 14.1 × 16.8 mm (ZRC 2015.295).