Water Cascade Beetles

Meruidae is a family of aquatic beetles in the suborder Adephaga, with only one genus and species, Meru phyllisae. The beetle species was first found in the early 1980s. and fully described in 2005. At 0.8 mm (0.031 in), it is one of the smallest adephagan beetles in the world. A survey of aquatic beetles of Venezuela indicated that Meru is most common during the wet season, when larger areas of granitic rock surface are covered with water film, which the adult beetles as well as the larvae inhabit.