Hydrocorisae

The term Hydrocorisae, also known as Cryptocerata, refers to a group of insects within the suborder Heteroptera (true bugs) that are adapted to aquatic life. These insects are characterized by their antennae, which are typically four-segmented and shorter than the head, often fitting into grooves on the underside of the head. Many aquatic Hydrocorisae possess fringe-like swimming hairs on their hind legs.1

This group includes several families, such as the Corixidae (water boatmen), Notonectidae (backswimmers), Nepidae (water scorpions), and Belostomatidae (giant water bugs). Water boatmen, for instance, are known for their boat-shaped bodies and oar-like hindlegs, and they scoop up algae and small organisms with their front legs. Some Hydrocorisae, like certain species of Hyposmocoma moths, exhibit remarkable amphibious capabilities, surviving underwater for extended periods due to specialized oxygen-diffusing pores.123