Amphiops mater sumatrensis Régimbart, 1903

Hendrich, Lars & Balke, Michael, 2004, Aquatic Coleoptera Of Singapore: Species Richness, Ecology And Conservation #, Raffles Bulletin of Zoology 52 (1), pp. 97-145 : 125

Amphiops mater sumatrensis Régimbart, 1903

( Fig. 28 )

Amphiops mater Sharp, 1873: 62 ; Balfour-Browne, 1937: 304-306;

Yano et al., 1983a: 19; Balke et al., 1999: 325; Hebauer et al.,

1999: 346. Amphiops sumatrensis Régimbart, 1903b: 61 . Amphiops mater sumatrensis Régimbart - Balfour-Browne, 1939c:

304; Hansen, 1999: 107, and references therein. Amphiops sp. : Yang, 1991: 94.

Material examined. – 205 specimens – Central catchment area – 9 ex., Chestnut Drive , 27 May.1994, NS143c ( ZRC) ; 1 ex., Chestnut Drive , 26 May.1994, NS 142e ( ZRC) ; 1 ex., MacRitchie Reservoir, Sime Road , 8 Apr.1997, coll. C. M. Yang et al. ( ZRC) ; 4 ex., MacRitchie Reservoir , stream towards reservoir, 20 Apr.1994, NS 123B/G, coll. C. M. Yang et al. ( ZRC) ; 1 ex., Nee Soon Swamp Forest n. pump house, 6 Dec.1996, coll. L. Hendrich ( ZRC) ; 1 ex., Lower Peirce Reservoir , after the concrete water runoff, 22 Apr.1997, NS 230a, coll. H. K. Lua ( ZRC) ; 3 ex., MacRitchie Reservoir , “Cc” inlet, 7 Jun.1994, NS 153, coll. Y.H. Lim ( ZRC) ; 1 ex., Seletar Reservoir Park , 12 May.1994, NS 132C, coll. H. K. Lua et al. ( ZRC) ; 1 ex., Seletar Reservoir , bank, “J” inlet, 16 May.1994, NS 134a, ZRC 6.18479, coll. H. K. Lua ( ZRC) . Sungai Buloh – 1 ex., fish pond, 15 Nov.1990, ZRC staff coll. ( ZRC) ; 23 ex., pond, 5 Dec.1996, coll. L. Hendrich ( CBH) . Other areas – 1 ex., Ulu Sembawang Road , 17 May.1994, NS 135 ( ZRC) ; 2 ex., Lorong Banir “K” stream, 10 Jun.1994, NS 157 E, coll. K.C. Queck et al. ( ZRC) ; 2 ex., Lorong Banir , pond 2, 16 Jun.1995, NS 191, coll. H. K. Lua et al. ( ZRC) ; 5 ex., Jalan Kayu , along muddy bank of fish ponds, 7 Jun.1994, LHK 257, coll. Y.H. Lim ( ZRC) ; 10 ex., Bukit Batok Nature Park , former granite quarry pond, 18 Dec.1995, LHK 293, coll. H. K. Lua & S.L. Goh ( ZRC) ; 1 ex., Bukit Batok Nature Park , former granite quarry pond, 9 Jul.1995, LHK 282, coll. H. K. Lua ( ZRC) ; 2 ex., Bukit Batok Nature Park , pond 2, 23 Apr.1997, coll. M. Balke, L. Hendrich & H. K. Lua ( CBH) ; 1 ex., Warwick Road , 13 Nov.1998, coll. K.L. Yeo ( ZRC) ; 78 ex., fish pond near Kranji Reservoir , 10 & 12 Oct.1990, coll. C. M. Yang et al. ( ZRC) ; 55 ex., Kampong Java Park , 6 Apr.1990, Y12-1, coll. C. M. Yang & H. K. Lua ( ZRC) .

Distribution. – Indonesia [Sumatra] and West Malaysia ( Balfour-Browne, 1939c; Hebauer et al., 1999; Hansen, 1999). Singapore!

Ecology. – A very common species which inhabits very shallow water at the edge of weedy ponds, pools, puddles, slow-flowing streams, ditches and paddy fields ( Yano et al., 1983a). It is sometimes found in small puddles fed by helocrenes or small streams. The beetles crawl among packs of rotten leaves, plant debris and mud ( Hebauer et al., 1999).

TRIBE ANACAENINI

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).