Ptychognathus pusillus Heller, 1865

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

Ptychognathus pusillus Heller, 1865

Fig. 5B

Material examined. 1 male, 13.1 by 10.7 mm ( ZRC; NJL161037 ), Tagoloan River, Brgy. Poblacion, Tagoloan town , Misamis Oriental prov., coll. N.J. Lagare, 24-25 Sep. 2016 .

Remarks. Ptychognathus pusillus Heller, 1865 (type locality: unknown) has been described and figured in detail by De Man (1895: 99, pl. 28 figs. 22, 22a–d, 1905: 537, pl. 17 figs. 1–5). It has a wide Indo-West Pacific distribution ranging from the Comoro Is., Nicobar Is., Andaman Is., and Christmas I., to Flores I., Lombok I., Japan, and Fiji ( Tesch 1918a; Bouchard et al. 2013). The present material from Tagoloan, a single male specimen, agrees well with the published descriptions. It was collected along the stony riverbank of the brackish downstream section of the Tagoloan River about 1 km inland.

New Philippine 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.