Hydraena (Hydraenopsis) palawanensis Freitag & Jaech , 2007

Freitag, Hendrik, 2013, Hydraena (Hydraenopsis) ateneo, new species (Coleoptera, Hydraenidae) and other aquatic Polyphaga from a small habitat patch in a highly urbanized landscape of Metro Manila, Philippines, ZooKeys 329, pp. 9-21 : 16

Hydraena (Hydraenopsis) palawanensis Freitag & Jaech, 2007 Fig. 2C

Hydraena (Hydraenopsis) palawanensis Freitag & Jäch, 2007: 26 (orig. descr.); Freitag and Pangantihon 2010: 140-141.

Material examined.

1 ♂ (CFM): "PHIL: Luzon, NCR, Quezon City, Ateneo de Manila Campus; spring creek N of Jesuit Residence, leaf packs; 14°38'29.6"N, 121°04'53.6"E, 62m asl; leg. Vidal, Go & Freitag 16.Nov.2012 (ADM3d)M"; 2 ♂♂, 1 ♀ (PNM): "PHIL.: Luzon, Quezon City, Ateneo de Manila Campus, near San Jose Seminary, temporary headwater creek, leaf litter; 14°38'06.4"N, 121°04'50.2"E, 39m asl.; 16.Nov.2012, leg. Vidal, Go & Freitag (ADM2d)M".

Distribution.

Hydraena palawanensis is known from Palawan and Mindoro. It is hereby recorded from Luzon for the first time.

Ecology.

This comparatively widely distributed Philippine species occurs in calm zones of undisturbed and moderately disturbed lotic waters. This might indicate a rather high ecological potency. Highest abundances are usually found in the littoral gravel or in residual pools of lowland creeks.