Notionotus attenuatus sp. n. from southern China with a key to the Old World species of the genus (Coleoptera: Hydrophilidae)

Abstract

The genus Notionotus Spangler, 1972 presently contains 16 species of small to very small water scavenger beetles in the Neotropical and Oriental Regions. The first two species were described from hygropetric habitats in Venezuela (Spangler 1972), with additional Neotropical species described from Mesoamerica (Perkins 1980). Known exclusively as a Neotropical genus for nearly thirty years, Hebauer (2001, 2003) subsequently recorded the genus in the Old World, describing six species from India and Southeast Asia. Most recently, Queney (2010) described species from northeastern South America.