On a Collection of Aquatic Beetles (Coleoptera: Gyrinidae, Haliplidae, Noteridae, Dytiscidae, Hydrophilidae and Hydrochidae) of Madhya Pradesh, India

The most successful order of the insect, Coleoptera includes 3, 87,100 described species from the whole world representing about 38% of insect species (1,020,007 species) of all the orders (Zhang, 2011). Of these, 40,000 species belong to aquatic beetles pertaining to at least eighteen families. Despite of having multitudes of freshwater aquatic habitats in India, knowledge on these beetles is quite insufficient.