Pyxidognathus granulosus A. Milne-Edwards, 1879

Lagare, Nickel Jean S., Mapi-Ot, Emmarie F., Molina, Ziljih S., Neri, Jemateo B., Nuñeza, Olga M. & Mendoza, Jose Christopher E., 2020, On a collection of freshwater and estuarine crabs (Crustacea: Brachyura) from Mindanao Island, the Philippines, Zootaxa 4868 (3), pp. 301-330 : 315-318

Pyxidognathus granulosus A. Milne-Edwards, 1879

Fig. 5D

Pyxidognathus granulosus, N.K. Ng et al. 2007: 256 .— Ng et al. 2008: 231, fig. 169.

Material examined. 1 female, 15.4 by 17.3 mm, ( ZRC; NJL160732 ), Brgy. Poblacion, Maigo town , Lanao del Norte prov., coll. N.J. Lagare, 22 Sep. 2016 .

Remarks. Pyxidognathus granulosus A. Milne-Edwards,1879 (type locality:Ovalau, Fiji) has a wide distribution in the Indo-West Pacific region: Indonesia, Japan, and Polynesia (De Man, 1892; Tesch 1918b; Holthuis, 1978; Maenosono et al. 2015). Detailed descriptions of P. granulosus were provided by Tesch (1918b: 168, pl. 11 fig. 2) and Serène & Moosa (1971: pl. 3 figs. C, D, pl. 4 figs. A–D). For the Philippines, N.K. Ng et al. (2007: 256) listed P. granulosus from Cebu I. as one of the varunid comparative material in their treatment of Xenograpsidae N.K. Ng, Davie, Schubart & Ng, 2007 , but without any discussion on the species. A photo of this specimen also appeared in Ng et al. (2008: 231, fig. 169), where it was said to occur in “fast-flowing streams near river mouths.” The material from Maigo, a single female specimen, agrees well with the published descriptions. It was collected from a slowflowing freshwater stream with a substrate consisting of pebbles and stones.

New Mindanao record.

Figures

FIGURE 5. Colour photos of recently preserved crabs (dorsal habitus). A, Ptychognathus altimanus (Rathbun, 1914), male 21.1 by 19.9 mm (ZRC), Tagoloan, Misamis Oriental; B, Ptychognathus pusillus Heller, 1865, male, 13.1 by 10.7 mm (ZRC), Tagoloan, Misamis Oriental; C, Ptychognathus riedellii (A. Milne-Edwards, 1868), male, 28.9 by 25.0 mm (ZRC), Oroquieta, Misamis Occidental; D, Pyxidognathus granulosus A. Milne-Edwards, 1879, female, 15.4 by 17.3 mm (ZRC), Maigo, Lanao del Norte; E, Utica gracilipes Adams & White, 1848, male, 24.2 by 22.8 mm (ZRC), Iligan, Lanao del Norte; F, Varuna litterata (Fabricius, 1798), male, 42.1 by 37.5 mm (ZRC), Dapitan, Zamboanga del Norte.G, Austruca perplexa (H. Milne Edwards, 1852), male, 13.9 by 10.6 mm (ZRC), Tagoloan, Misamis Oriental; H, Ocypode ceratophthalmus (Pallas, 1772), male, 30.8 by 27.8 mm (ZRC), Manukan, Zamboanga del Norte. Scale bars: 10 mm.