title: Key to Plecoptera nymphs from the Brazilian Amazon (Insecta).
abstract: Nymphs of 22 species of Plecoptera from the Brazilian Amazon are keyed and illustrated to enhance their usefulness as water quality indicator taxa. Four described species of Anacroneuria, two species of Macrogynoplax, and two species of Enderleina have been associated with adults: Anacroneuria marlieri, A. manauensis, A. minuta, A. singularis, M. delicata, M. pulchra, E. froehlichi, and E. flinti. Nymphs of 14 additional morphospecies not yet associated with adults are included. Characters of the head, pronotum, mesonotum, and metanotum are used to distinguish late instar nymphs.
authors.affiliation: Museu Paraense Emílio Goeldi, Coordenação de Zoologia, Ave. Presidente Tancredo Neves 1901, Belém, Par, Brazil.. jribeiro@museu-goeldi.br.
authors.forename: José Moacir Ferreira
authors.initials: JM
authors.lastname: Ribeiro
authors.forename: Inocêncio DE Sousa
authors.initials: IS
authors.lastname: Gorayeb
mesh_terms: D000818:Animals; D001938:Brazil; D007313:Insecta / Q000033:anatomy & histology* / Q000145:classification* / Q000254:growth & development; D009758:Nymph / Q000033:anatomy & histology / Q000145:classification / Q000254:growth & development; D045483:Rivers; D060753:Water Quality
keywords: Plecoptera, Stonefly, immatures, Amazon basin, identification