Aquatic Coleoptera Of Singapore: Species Richness, Ecology And Conservation # Author Hendrich, Lars Author Balke, Michael text Raffles Bulletin of Zoology 2004 52 1 97 145 journal article 10.5281/zenodo.13244881 2345-7600 13244881 Parathroscinus magnus Wooldridge, 1990 Parathroscinus magnus Wooldridge, 1990: 254 . Material examined . – Not seen – 1 ex. , Mandai mangrove, MD3, 11 May.1988 , coll. D. H. Murphy ( USNM ) . Distribution . – Singapore ( Wooldridge, 1990 ). Ecology . – “Under rotten intertidal wood” ( Wooldridge, 1990 ). 24 26 28 25 27 29 30 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). Remarks. – Just the holotype is known.