Hydroglyphus inconstans ( Régimbart, 1892 )

Hendrich, Lars & Balke, Michael, 2004, Aquatic Coleoptera Of Singapore: Species Richness, Ecology And Conservation #, Raffles Bulletin of Zoology 52 (1), pp. 97-145 : 113

Hydroglyphus inconstans ( Régimbart, 1892)

Bidessus inconstans Régimbart, 1892: 119 .

Guignotus inconstans (Régimbart) - Abe, 1989: 2.

Hydroporus intermixtus Walker, 1858: 202-213 ; Régimbart, 1899: 227 (misident.).

Hydroglyphus inconstans (Régimbart) - Yano et al., 1983a: 17; Biström, 1988: 14; Hendrich & Balke, 1995: 33; Nilsson et al., 1995: 363; Nilsson, 2001: 123.

Material examined. – 61 specimens – Central catchment area - 8 ex., Nee Soon Swamp Forest , 9 May.1992, 795D, coll. K. L. Yeo et al. ( ZRC) . Other areas - 50 ex., Sembawang Senoko , grassland on eastern side of Sembawang, 10 Jan.1992, Y 777 B, coll. C. M. Yang & K. L. Yeo ( ZRC) ; 1 ex., Lorong Banir , pond 2, 16 Jun.1995, NS 192, coll. H. K. Lua & C. M. Yang ( ZRC) ; 1 ex., Lorong Banir , pond 1, 29 Jun.1995, NS 193, coll. H. K. Lua & C. M. Yang ( ZRC) ; 1 ex., Singapore Science Centre , 22 Oct.1990, coll. C. M. Yang & K. L. Yeo ( ZRC) .

Distribution. – This widespread Oriental species occurs from India and Sri Lanka to Sumatra, Taiwan, and north to the Ryukyu Islands ( Biström, 1988; Nilsson et al., 1995). Singapore!

Ecology. – A lentic species living in very shallow water at the edge of small, exposed, and well vegetated pools, puddles and slow flowing streams and ditches. Hydroglyphus inconstans also occurs in artificial habitats such as paddy fields ( Yano et al., 1983a; Hendrich & Balke, 1995).