Hypocolpus abbotti ( Rathbun, 1894 )

Mendoza, Jose Christopher E. & Ng, Peter K. L., 2010, The Euxanthine Crabs (Crustacea: Brachyura: Xanthidae) Of The Philippines, Raffles Bulletin of Zoology 58 (1), pp. 57-74 : 63

Hypocolpus abbotti ( Rathbun, 1894)

( Fig. 3A, B )

Material examined. – 2 males, 46.3 × 32.5 mm, 51.1 × 36.0 mm, 1 female, 45.0 × 30.8 mm ( ZRC 2001.0469 ), Balicasag Is. , 50–200 m, coll. local fishermen with tangle nets, Dec.2000 ; 1 male, 42.4 × 29.1 mm ( ZRC 2001.0673 ), Balicasag Is. , 50–500 m, coll. local fishermen with tangle nets, 28 Nov.2001 ; 1 male, 48.7 × 34.4 mm (NMCR-27335), Balicasag Is. , 50–200 m, coll. local fishermen with tangle nets, 02 Mar.2004 ; 1 male, 41.6 × 28.7 mm ( MNHN-B31888 ), Balicasag Is. , 50–200 m, coll. local fishermen with tangle nets, 29 May 2004 ; 1 male, 39.1 × 27.1 mm (NMCR-27336), Balicasag Is. , 50–200 m, coll. local fishermen with tangle nets, May 2004 ; 1 female, 7.9 × 5.8 mm (NMCR-27337), Stn. B 19, reef slope with cave, 17 m, 9°29.4'N 123°56.0'E, Pamilacan Is., coll. PANGLAO 2004 Marine Biodiversity Project, 21 Jun.2004 .

Remarks. – This species is easily differentiated from other species of Hypocolpus by its densely setose carapace and the morphology of the subhepatic cavity, which is divided by two subparallel crests. All the adult specimens were collected in tangle nets. This species was first described from Aldabra Island in the Indian Ocean ( Rathbun, 1894), and has also been reported from nearby Madagascar (Guinot- Dumortier, 1960; Serène, 1984). In the western Pacific, it has been found in Amami-Oshima in southern Japan ( Takeda, 1972) and Taiwan ( Ho et al., 2000). This is the first record of Hypocolpus abbotti in the Philippines.

Comparative material. – Holotype male, 8.6 × 6.5 mm (KPM- NH0107080), between Ito City and Hatsushima Islet, Sagami Bay, Japan, coll. T. Sakai, 1932.

Remarks. – This species was originally described from Sagami Bay in Japan, and has subsequently been reported

Figures

Fig. 3. Hypocolpus abbotti (Rathbun, 1894), male, (41.6 by 28.7 mm) (Balicasag Is., MNHN-B31888): A, dorsal view; B, fronto-lateral view of subhepatic cavity; Hypocolpus haanii Rathbun, 1909, male (49.5 × 34.5 mm) (Balicasag Is., NMCR-27339); C, dorsal view; D, fronto-lateral view of subhepatic cavity; Hypocolpus kurodai Takeda, 1980, male (21.0 × 13.5 mm) (Marinduque, NMCR-6609); E, dorsal view; F, fronto-lateral view of subhepatic cavity.