title: Two new subterranean species of Hyalella Smith, 1874 (Crustacea: Amphipoda: Hyalellidae) from Brazil.
abstract: Two new species of Hyalella from Brazil are described. Hyalella veredae sp. n. shows the following characters: eyes reduced or absent in some specimens; antenna 1 and antenna 2 of similar size, and a curved seta on the inner ramus of male uropod 1. Hyalella formosa sp. n. is characterized by the absence of eyes, antenna 1 longer than antenna 2 and a curved seta on the inner ramus of male uropod 1. The species were found on caves located in two private properties, both under the impact of agricultural activities, which demonstrates a potential threat to these subterranean environments.
authors.affiliation: Laboratório de Carcinologia, Departamento de Zoologia, Universidade Federal do Rio Grande do Sul; Programa de Pós-Graduação em Biologia Animal, Av. Bento Gonçalves, Nº 9500 prédio 43435, 91501-970, Porto Alegre, Rio Grande do Sul, Brazil; Email: jojomonticelli@hotmail.com.
authors.forename: Giovanna Monticelli
authors.initials: GM
authors.lastname: Cardoso
authors.affiliation: Laboratório de Carcinologia, Departamento de Zoologia, Universidade Federal do Rio Grande do Sul; Programa de Pós-Graduação em Biologia Animal, Av. Bento Gonçalves, Nº 9500 prédio 43435, 91501-970, Porto Alegre, Rio Grande do Sul, Brazil; Email: unknown.
authors.forename: Paula Beatriz
authors.initials: PB
authors.lastname: Araujo
authors.affiliation: Laboratório de Carcinologia, Departamento Biologia, Universidade Federal de Lavras; Programa de Pós-Graduação em Ecologia Aplicada, Campus Universitário, 37200-000, Lavras, Minas Gerais, Brazil; Email: unknown.
authors.forename: Alessandra Angélica
authors.initials: AA
authors.lastname: De Pádua Bueno
authors.affiliation: Centro de Estudos em Biologia Subterrânea, Departamento de Biologia, Universidade Federal de Lavras; Programa de Pós-Graduação em Ecologia Aplicada, Campus Universitário, 37200-000, Lavras, Minas Gerais, Brazil; Email: unknown.
authors.forename: Rodrigo Lopes
authors.initials: RL
authors.lastname: Ferreira
mesh_terms: D033304:Amphipoda / Q000033:anatomy & histology / Q000145:classification*; D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology; D000818:Animals; D001938:Brazil; D017753:Ecosystem; D005260:Female; D008297:Male