Revisão taxonômica de Alvarengiini Frey, 1975 (Coleoptera: Melolonthidae: Rutelinae)

Abstract

Alvarengiini Frey, 1975 was long neglected and omitted in recent works. In order to solve the problems and to establish the limits of the tribe under a taxonomic overview, in the present revision two synonyms were proposed: Alvarengius silphoides Frey, 1975 sin. nov. for Ottokelleria dispar (Burmeister, 1847), and as a consequence of that act, Alvarengius Frey, 1975 sin. nov. for Ottokelleria d’Andretta & Martínez, 1957; a genus has been described for the first time: Carinochilus gen. nov. to allocate C. marginatus (Burmeister, 1847) comb. nov. and two new species, C. gnathidium sp. nov. and C. macrostipes sp. nov.; and the lectotype for O. dispar was designated. All the taxa were defined and illustred; identification keys for tribes, genera and species were provided supplementary to the comparative notes, and distributional data ware added. Alvarengiini has 4 species in two genera, distributed from Bahia (BA) in the Northeast, to Paraná (PR) in the South of Brazil, found in areas of Atlantic Forest.