Helochares pallens ( MacLeay, 1825 )

Hendrich, Lars & Balke, Michael, 2004, Aquatic Coleoptera Of Singapore: Species Richness, Ecology And Conservation #, Raffles Bulletin of Zoology 52 (1), pp. 97-145 : 128

Helochares pallens ( MacLeay, 1825)

( Fig. 29 )

Enhydrus pallens MacLeay, 1825: 140 .

Helochares lewisius Sharp, 1873: 60 . Helochares dispar Sharp, 1903: 7 . Enochrus pallens ( MacLeay, 1825) - Knisch, 1924b: 211. Helochares pallens ( MacLeay, 1825) - d’Orchymont, 1932: 688;

Fernando, 1961: 23; 1964: 82, 86; Yano et al., 1983a: 20;

Hebauer, 1995b: 7; Hansen, 1999: 162, and references therein.

Material examined. – 3 specimens – Sungai Buloh – 2 ex., fish pond, 15 Nov.1990, coll. ZRC staff ( ZRC). Other areas - 1 ex., Lorong Banir, Pond 2, 16 Jun.1995, 191, coll. H. K. Lua et al. ( ZRC) .

Distribution. – Widespread in the Afrotropical, Oriental and Australasian realms (d’Orchymont, 1932; Hebauer, 1995b; Hansen, 1999). Singapore!

Ecology. – A lentic species living in very shallow water at the edge of exposed, well-vegetated, mostly temporary pools, puddles and slow-flowing ditches, in primary and cultivated areas. In other parts of Southeast Asia the species was also collected in paddy fields ( Yano et al., 1983a). The species has been recorded at ligh (d’Orchymont, 1927; Fernando, 1961)

Figures

Figs. 24-30. 24. Cybister sugillatus Erichsin, 1834 (Fam. Dytiscidae, 22.0 mm); 25 Hydrocanthus indicus Wehncke, 1876 (Fam. Noteridae, 4.5 mm); 26. Spercheus stangli Schwarz & Barber, 1917 (Fam. Spercheidae, 4.2 mm); 27. Berosus fairmairei Zaitzev, 1908 (Fam. Hydrophilidae, 4.5 mm); 28. Amphiops mater sumatrensis (Sharp, 1873) (Fam. Hydrophilidae, 3.5 mm); 29. Helochares pallens (MacLeay, 1825) (Fam. Hydrophilidae, 3.1 mm);30. Hydrophilus cavisternum Bedel, 1891 (Fam. Hydrophilidae, 32.0 mm).