Parathelphusa valida Ng & Goh, 1987

Ng, Peter K. L. & Ng, Paul Y. C., 2018, The freshwater crabs of Danum Valley Conservation Area in Sabah, East Malaysia, with a description of a new species of Thelphusula Bott, 1969 (Crustacea, Brachyura, Gecarcinucidae, Potamidae, Sesarmidae), ZooKeys 760, pp. 89-112 : 89

Parathelphusa valida Ng & Goh, 1987 Figure 6C, D

Parathelphusa valida Ng & Goh, 1987: 317, pls 1, 2; fig. 1; Ng 1995: 79; Tan and Ng 1997: 555; Ng et al. 2008: 71; Klaus et al. 2013 68.

Material examined.

Holotype: male (40.0 × 30.0 mm) (ZRC 1989.2024), stream outside Simud Hitam Cave, Gomantong, Sabah, Borneo, ca 5°33'N 118°06'E, coll. P. Chapman, 27 March 1986. Paratypes: 1 male (ZRC 1989.2192), Simud Puteh Cave, Gomantong, Sabah, Borneo coll. P. Chapman, 27 March 1986; 2 males (ZRC 1990.0445-0446), 1 male (ZRC 1989.3402), Sungei Madai, in stream just outside Madai Caves, Kunak, Lahad Datu district, Sabah, Borneo, ca. 04°44'N 118°12'E, coll. January 1985; 1 male (73.0 × 73.0 mm) (ZRC 1990.0444), Sungei Binuang, stream adjacent to Baturung Caves, Kunak, Lahad Datu district, Sabah, Borneo, 4°43'N 117°59'E, coll. R. Goh, 20 March 1985. Others: 1 female (ZRC 1989.3403), Sungei Madai, in stream just outside Madai Caves, Kunak, Lahad Datu district, Sabah, Borneo, ca. 04°44'N 118°12'E, coll. R. Goh, January 1985; 1 male (ZRC 1996.1897), Gomantong Caves Sabah, coll. C.L. Chan, January 1995; 1 male, 1 female (ZRC 2009.0091), Gomantong Caves, coll. D. Chia, 21 December 1999; 1 female (ZRC 1996.1999), Sungei Binuang, Banturung Caves, Lahad Datu, coll. R. Goh, 20 March 1989; 1 male (ZRC 1990.0571), Danum Valley, Sabah, coll. R. Stuebing, 1980s; 1 male (ZRC 1990.0568), Danum Valley, Lahad Datu, Sabah, coll. R. Stuebing, 23 July 1989; 1 male, 2 females (ZRC 1008.1346), Sungei Palun Tambun, tributary of Sungei Segama, upstream of Danum Valley Field Centre, Lahad Datu, Sabah, coll. H.H. Tan et al., 1 October 1996; 2 males, 5 females (ZRC 1996.1998), Kallang Sebaru stream, 4°58'4.8"N, 107°48'56.5"E, Danum Valley, Lahad Datu, Sabah, coll. H.H. Tan et al., 1 October 1996; 1 male, 1 female (ZRC 1996.1997), Sepat Kalisun, Danum Valley, Lahad Datu, Sabah, coll. H.H. Tan et al., 1 October 1996; 2 males (ZRC 1996.1995) Ca Gin Stream Right, 4°59'8.5"N, 107°54'5.1"E, Danum Valley, Lahad Datu, Sabah, coll. H.H. Tan et al., 2 October 1996; 2 females (ZRC 1996.2000), Sungei Bole Ketabil tributary, 4°57'33.5"N, 117°51'34.1"E, Danum Valley Field Centre, Lahad Datu, Sabah, coll. H.H. Tan et al., 2 October 1996; 1 male, 2 females (ZRC 1996.1994), Sungei Bole Ketabil tributary, 4°57'33.5"N, 117°51'34.1"E, Danum Valley Field Centre, Lahad Datu, Sabah, coll. H.H. Tan et al., 2 October 1996; 2 males, 2 females (ZRC 2010.0045), West Six stream, tributary of Sungei Segama, 600 m inside conservation area, coll. H.H. Tan et al., 4 October 1996; 1 male, 1 female (ZRC 1996.2004), West Eight, forest stream, 800 m into conservation area, tributary of Sungei Segama, Danum Valley Field Centre, Lahad Datu, Sabah, coll. H.H. Tan et al., 4 October 1996; 2 males (ZRC 2009.0309), Sungei Palum Tambum, near Danum Valley Field Centre, Lahad Datu, Sabah, coll. K. Martin-Smith, 9 October 1996; 1 female (34.7 × 28.4 mm) (ZRC 2017.1268), Danum Valley Field Centre, in forest streams, Lahad Datu, Sabah, Borneo, at night, coll. locals, 20 July 2017; 1 male (27.8 × 22.7 mm), 1 young female (17.4 × 5.3 mm) (ZRC 2017.1269), Danum Valley Field Centre, just outside dorms in streams, at night, Lahad Datu, Sabah, Borneo, coll. 22 July 2017; 1 male, 1 female (ZRC 2008.483), Maliau Basin, stream draining into Sungei Maliau, coll. S.H. Tan and T.H.T. Tan, 15-17 May 1996; 2 males, 1 female (ZRC 2008.0607), Maliau Basin, tributary of Sungei Maliau, adjacent Camp 88, coll. S.H. Tan and T.H.T. Tan 15-17 May 1996; 1 male, 1 female (ZRC 1997.0104), Maliau Basin, coll. S.H. Tan and T.H.T. Tan, 13-17 May 1996; 1 female (ZRC 1989.2194), Maliau Basin, Sabah, coll. Sabah Foundation Expedition 1988; 1 male, 2 females (ZRC 1996.2005), Tawau Plateau, Telupid Sandakan stream, coll. R. Goh, 1990; 5 males (ZRC 2008.1345), stream by Air Panas, near base of Tawau Hills Park, coll. H.H. Tan et al., 5 October 1996; 1 male 4 females (ZRC 1996.2008), Tawau, Sabah, 4°18'03"N, 117°54'20.7"E, coll. H.H. Tan et al., 5 October 1996; 2 males, 4 females (ZRC 1996.2001), Tawau, Sungei Matarid, Gua Madai, Jalan Madai, 4°43'8.7"N, 118°9'14.7"E, Tawau, Sabah, H.H. Tan et al., 6 October 1996; 1 male (ZRC 1994.4201), Danau Biandum, Kinabatangan River, Sabah, coll. S.H. Tan et al., 8 April 1994.

Colour.

Fresh specimens have an olive-brown carapace with the grooves and striae reddish brown; the ambulatory legs are brown with specks of reddish brown; and the chelipeds are orange, with the fingers black except for the orange tip (Fig. 6C, D).

Remarks.

The recently collected specimens agree well with the published descriptions and figures of the species, originally described from Gomantong, Bettontan and Lahad Datu in Sabah ( Ng and Goh 1987). The species has a wide range in eastern Sabah (see also Ng 1995; Tan and Ng 1997).

Parathelphusa valida occurred syntopically with T. capillodigitus sp. n. and was present in a variety of habitats including jungle streams, swampy areas and on the forest floor. It has not been previously formally recorded from Danum Valley, which is surprising, considering it is by far the most common species there and there are many specimens in the museum dating back to the 1980s.