title: Four new species and first nominal record of Chasmogenus Sharp, 1882 (Coleoptera: Hydrophilidae) from Brazil.
abstract: The genus Chasmogenus Sharp, 1882 (Hydrophilidae: Acidocerinae) is recorded from Brazil for the first time. Four new species are described and illustrated from the Southeastern Region of the country: C. fluminensis sp. nov. (Rio de Janeiro State), C. lilianae sp. nov. (Rio de Janeiro State), C. itatiaia sp. nov. (Minas Gerais and Rio de Janeiro States), and C. ubatuba sp. nov. (São Paulo State). Chasmogenus sapucay Fernández, 1986 is recorded for the first time from Northern and Southeastern Brazil. Notes on morphology and an updated key for the South American species are provided.
authors.affiliation: Laboratório de Entomologia, Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Caixa Postal 68044, 21941-971, Rio de Janeiro, RJ, Brasil.; Email: brclarkson@gmail.com.
authors.forename: Bruno
authors.initials: B
authors.lastname: Clarkson
authors.affiliation: Laboratório de Entomologia, Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Caixa Postal 68044, 21941-971, Rio de Janeiro, RJ, Brasil.; Email: brclarkson@gmail.com.
authors.forename: Nelson
authors.initials: N
authors.lastname: Ferreira
mesh_terms: D000818:Animals; D001938:Brazil; D001517:Coleoptera / Q000033:anatomy & histology* / Q000145:classification* / Q000502:physiology; D003710:Demography; D008297:Male; D013045:Species Specificity