Eretes griseus ( Fabricius, 1781 )

Hendrich, Lars & Balke, Michael, 2004, Aquatic Coleoptera Of Singapore: Species Richness, Ecology And Conservation #, Raffles Bulletin of Zoology 52 (1), pp. 97-145 : 119

Eretes griseus ( Fabricius, 1781)

( Fig. 23 )

Dytiscus sticticus Linnaeus, 1767: 666 . Dytiscus griseus Fabricius, 1781: 293 . Eretes sticticus (Linnaeus) - Castelnau, 1833: 450. Eretes sticticus (Linnaeus) - Fernando, 1964: 87; Vazirani, 1977:

73, and references therein; Chen et al., 1998: 27; Nilsson, 2001:

99. Eretes griseus ( Fabricius, 1781) - Miller, 2002: 247-272.

Material examined. – 3 specimens – Central catchment area - 2 ex., Rifle Range Road , 22 Jul.1982, coll. D. H. Murphy ( ZRC). Other areas - 1 ex., Kent Ridge Pond , 20 Jul.1982, coll. D. H. Murphy ( ZRC) .

Distribution. – Oriental and East Palaearctic realms ( Miller, 2002). Singapore!

Ecology. – This species occurs in large, unshaded standing water bodies with sandy or gravelly bottom, and without or sparse aquatic vegetation ( Fernando, 1964). In Southeast Asia, Eretes griseus is therefore more common in cultivated areas than in forested areas. Eretes griseus is a good flyer and often attracted to light.

Remarks. – This species is sold as food in Northern Thailand ( Chen et al., 1998).

TRIBE HYDATICINI

Figures

Figs. 18-23. 18.Hydaticus fabricii (MacLeay, 1825) (Fam. Dytiscidae, 10.5 mm); 19. Leiodytes nicobaricus (Redtenbacher, 1867) (Fam. Dytiscidae, 2.1 mm); 20. Hydrovatus rufoniger rufoniger (Clark, 1863) (Fam. Dytiscidae, 3.6 mm); 21. Laccophilus medialis Sharp, 1882 (Fam. Dytiscidae, 3.3 mm); 22. Copelatus minutissimus Balfour-Browne, 1939 (Fam. Dytiscidae, 4.1 mm); 23. Eretes griseus (Fabricius, 1781) (Fam. Dytiscidae, 13.5 mm).