Rizalthus anconis Mendoza & Ng, 2008

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 : 70

Rizalthus anconis Mendoza & Ng, 2008

Rizalthus anconis Mendoza & Ng, 2008b: 387 , Figs. 1 , 2 , 9A.

Material examined. – Holotype male, 12.5 × 7.9 mm (NMCR- 27507), Stn. R30 , reef slope with black coral, 15–37 m, 9°37.1'N 123°46.1'E, Napaling, Panglao Is., coll. PANGLAO 2004 Marine Biodiversity Project, 8 Jun.2004; paratypes – 2 females, 7.8 × 4.5 mm to 11.2 × 7.3 mm ( MNHN-B30700 ), 1 ovigerous female, 12.7 × 8.1 mm ( ZRC 2008.0215 ), Stn. B 39, reef wall with small caves, 17–25 m, 9°32.8'N 123°42.1'E, Pontod Lagoon 1, Panglao Is., coll. PANGLAO 2004 Marine Biodiversity Project, 2 Jul.2004; 1 male, 4.2 × 2.7 mm ( ZRC 2008.0216 ), Stn. B 10, reef wall with small caves, 3–14 m, 9°36.5'N 123°45.6'E, Momo Beach, Panglao Is., coll. PANGLAO 2004 Marine Biodiversity Project, 10 Jun.2004; 1 female, 7.0 × 4.3 mm ( ZRC 2008.0217 ), Stn. B 17, reef wall with small caves, 3–21 m, 9°37.5'N 123°46.9'E Bingag, Panglao Is., coll. PANGLAO 2004 Marine Biodiversity Project, 19 Jun.2004.

Remarks. – This is the type species of the monotypic genus Rizalthus , recently described by Mendoza & Ng (2008b), and known only from the central Philippines.

Figures

Fig. 1. Live colouration of euxanthine crabs from the Philippines: A, Cranaothus deforgesi Ng, 1993, male (8.0 × 5.9 mm) (R59, Panglao Is., ZRC 2008.1365); B, Crosnierius carinatus Serène & Vadon, 1981, female (15.6 × 11.8 mm) (CP2737, eastern coast of Luzon, ZRC 2008.1370); C, Epistocavea mururoa Davie, 1993, male (33.2 × 23.5 mm) (L36, Panglao Is., ZRC 2008.1371); D, Euxanthus herdmani Laurie, 1906, male (10.0 by 7.6 mm) (S32, Panglao Is., NMCR-27334); E) Euxanthus huonii (Hombron & Jacquinot, 1846), male (31.9 × 21.9 mm) (M17, Panglao Is., ZRC 2008.1376); F, Hepatoporus orientalis (Sakai, 1935) male (8.1 × 6.0 mm) (CP2862, off Batangas coast, ZRC 2008.1379).

Fig. 2. Live colouration of euxanthine crabs from the Philippines: A, Hypocolpus haanii Rathbun, 1909, male juv., (11.5 × 8.0 mm) (B11, Pamilacan Is., ZRC 2008.1383); B, Ladomedaeus fungillus Manuel-Santos & Ng, 2007, male juv. (9.7 × 7.0 mm) (CP2708, ZRC 2008.1389); C, Miersiella cavifrons Takeda, 1989, male (9.8 × 6.6 mm) (L36, Panglao Is., ZRC 2008.1391); D, Paramedaeus globosus Serène & Vadon, 1981, male (6.0 × 4.6 mm) (T36, Cervera Shoal, MNHN-B31891); E, Paramedaeus simplex (A. Milne-Edwards, 1873), female (9.7 × 6.8 mm) (S7, Panglao Is., NMCR-27356); F, Paraxanthodes obtusidens (Sakai, 1965), male (18.6 × 13.0 mm) (CP2747, ZRC 2008.1410).