REVISION OF THE GENUS CYMBIODYTA BED. (COLEOPTERA: HYDROPHILIDAE)

Abstract

A revision of the genus Cymbiodyta Bed. (Hydrophilidae: Hydrobiinae) is presented including a short historical review and a discussion of diagnostic characters and techniques. Twenty-nine species are recognized. Twelve species and two subspecies are described as new. C . hatchi D. C. Miller, 1964 is placed in synonymy with C . pacifica Leech, 1948, and C . morata Horn, 1890, with C . dorsalis (Motschulsky, 1859). Neotypes are designated for C . vindicata Fall and C . acuminata Fall; lectotypes are designated for C . brevicollis (Sharp), C . fraterculus (Sharp), C . morata Horn, C . polita (Sharp), and C . blanchardi Horn.The genus is divided into 11 species groups. A key to species is provided. Each species is described and illustrated, and all available bionomic and distributional data are presented. Distributional records are mapped.