title: Novadessus viracocha, a new genus and species of Bidessini Sharp from Peru (Coleoptera, Adephaga, Dytiscidae, Hydroporinae).
abstract: Novadessus viracochagen. n.andsp. n.is described from Peru. The genus distinctly is characterized by having the following combination: (1) a transverse occipital line absent on the head; (2) the anterior clypeal margin not modified; (3) a pair of basal pronotal striae present; (4) the basal elytral stria absent; (5) the elytral sutural stria absent; (6) the elytron without longitudinal carinae; (7) the epipleuron without a transverse carina at the humeral angle; (8) the lateral lobes of the male aedeagus two-segmented; (9) the overall habitus elongate and oval, with lateral pronotal and elytral margins discontinuous; (10) without distinct denticles along the posterior margins of the abdominal sternites; (11) the male genitalia (both median lobe and lateral lobes) bilaterally symmetrical; and (12) the metatrochanter small relative to the metafemur, approximately 0.6 × the length of the metafemur. The genus is diagnostically similar toFontidessusMiller and Spangler andNeobidessodesHendrich and Balke, but is superficially more similar toLiodessusGuignot. The habitus and male genitalia are illustrated, and a distribution map is provided.
authors.affiliation: Department of Biology and Museum of Southwestern Biology, University of New Mexico, Albuquerque, NM 87131-0001 USA.
authors.forename: Kelly B
authors.initials: KB
authors.lastname: Miller
keywords: Coleoptera; Dytiscidae; Neotropical; Novadessus; Water beetles; classification; new genus; taxonomy