A review of the genus Stephanorhynchus White, 1846 (Coleoptera: Curculionidae: Eugnomini), with a description of three new genera and one new species from New Zealand.

Stephanorhynchus White, 1846 is a eugnomine weevil genus endemic to New Zealand, with 18 nominal taxa described within the genus. Examination of the type specimens of these taxa with greater understanding of related genera has led to the distinction of four well-defined genera from the species ascribed to the genus. These are the monotypic genus Pittosporobiusgen. nov., with type species P. crassus (Broun, 1880) comb. nov.; Moanusgen. nov., with type species M. lawsoni (Sharp, 1876) comb. nov., and including M. brevipennis (Pascoe, 1876) comb. nov. (= Stephanorhynchus griseipictus Broun, 1886 syn. nov.), M. nigrosparsus (Broun, 1893) comb. nov. (= Stephanorhynchus pygmaeus Broun, 1903 - syn. nov.) and M. tumulus Mazur and Brown sp. nov. (type locality Mt Dick, Otago Lakes, South Island, New Zealand); Glabrorhynchusgen. nov., with type species G. costifer (Broun, 1893) comb. nov., and including G. insolitus (Broun, 1893) comb. nov., G. purus (Pascoe, 1876) comb. nov., and G. halli (Broun, 1914) comb. nov. A reduced concept of Stephanorhynchus White, 1846 contains now four species: S. curvipes White, 1846, S. tuberosus Broun, 1881, S. attelaboides (Fabricius, 1775), S. aper Sharp, 1886. All species within the complex have been redescribed, with details provided of their external morphology and terminal structure and supported by drawings and colour photographs. Keys to genera and species are also provided as well as distribution maps and information about host plants and biology. The systematic position of these genera within the Eugnomini and their similarity with the genus Callistomorphus Perroud, 1865 from New Caledonia are discussed.Article registered number New taxa Glabrorhynchus gen. nov. Moanus gen. nov. Moanus tumulus sp. nov.Pittosporobius gen. nov. [ABSTRACT FROM AUTHOR]