Taxonomic revision of Teratopactus Heller (Coleoptera: Curculionidae)

GUEDES, J. V. C.; LANTERI, ANALÍA A.; DEL RÍO, M. GUADALUPE

Gramado-RS, Brasil

Congreso; XX Congresso Brasileiro de Entomologia; 2004

Teratopactus Heller (Entiminae: Naupactini) is a broad-nosed weevil genus widespread in South America. It includes seven species: T. capucinus (Perty) [type species; syn. T. senex (Boheman)]; T. elegans (Lucas) comb. nov.; T. gibbicollis (Boheman); T. nodicollis (Boheman) [syn. T. angulicollis (Lucas), T. paulanus (Fonseca & Autuori), T. serripes (Boheman), and T. perpastus (Boheman) syn. nov.]; T. retusus (Boheman); T. tuberculatus (Arrow) and T. vittatus (Mannerheim) comb. nov. All species except T. tuberculatus have a strong ovipositor lacking styli; T. elegans, T. nodicollis and T. vittatus show well developed humeri, bearing a strong tooth; and T. retusus, T. capucinus and T. gibbicollis are characterized by a strongly gibbous pronotum and reduced humeri. Teratopactus nodicollis is the most variable and widespread species (Argentina, Brazil, Bolivia, Paraguay and Uruguay), T. tuberculatus and T. elegans range through Brazil and Paraguay, and the remaining species are endemic to Brazil. The first cladistic analysis of the genus Teratopactus plus two outgroups using 36 morphological characters, established synapomorphies, and revealed relationships between the species in a single cladogram with the following topology: (T. tuberculatus ((T. elegans (T. nodicollis-T. vittatus)) (T. retusus (T. capucinus-T. gibbicollis)))).  The revision includes a key to species, habitus photographs, drawings of genitalia, maps and a cladogram. Key words: Weevils, Naupactini, Teratopactus, systematics, cladistics