Survey of aquatic beetles with some new records from the hazara pukhuri, Sonitpur, Assam, North East India

The present paper is based on a preliminary survey of aquatic beetles in a manmade aquatic ecosystem‘HazaraPukhuri’, a large perennial pond in Sonitpur district, Assam, India. The survey carried out during 2014-2015could contribute altogether 18species of aquatic beetles belonging to 13 genera and only 4 families, viz-Dytiscidae, Hydrophilidae, Noteridae and Gyrinidae. Family Dytiscidaere presents the highest number of 9 species under 4 subfamilies. Habitat heterogeneity in terms of aquatic macrophytes is found to be the major factor in rich species diversity of aquatic beetles in the studied ecosystem.