title: Two new species of Apobaetis Day, 1955 (Ephemeroptera: Baetidae) from Brazil.
abstract: Apobaetis Day, 1955 species are known for their small size and preference for sandy stream substrate. Species which possess such habitat preference commonly possess long and slender legs and claws, but, in Apobaetis, the length of the tarsal claw rarely is so long that it exceeds the length of tarsus, occurring only in two species: A. lakota McCafferty, 2000 from USA and A. hamadae Cruz, Boldrini & Salles, 2011 from Brazil. In the present study, two new species with tarsal claws that exceed the length of the tarsi are described: Apobaetis pucupi sp. nov. from southeast Brazil and Apobaetis kethepiali sp. nov. from northernmost Brazil. Additionally, a new key for nymphs of Apobaetis is proposed.
authors.affiliation: Programa de Pós-graduação em Entomologia, Instituto Nacional de Pesquisas da Amazônia (INPA), CEP 69060-001, Manaus, AM, Brazil Instituto Federal de Educação, Ciência e Tecnologia do Amazonas-IFAM, Lábrea, AM, Brazil; Email: pvilelacruz@gmail.com.
authors.forename: Paulo Vilela
authors.initials: PV
authors.lastname: Cruz
authors.affiliation: Universidade Federal do Rio de Janeiro (UFRJ), Instituto de Biologia, Departamento de Zoologia, Laboratório de Entomologia, Caixa Postal 68044, Cidade Universitária, CEP: 21941-971, Rio de Janeiro, RJ, Brazil.; Email: marciar.bio@gmail.com.
authors.forename: Marcia Regina
authors.initials: MR
authors.lastname: De-Souza
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D001938:Brazil; D017753:Ecosystem; D065133:Ephemeroptera / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D005260:Female; D008297:Male; D009758:Nymph / Q000033:anatomy & histology / Q000145:classification / Q000254:growth & development; D009929:Organ Size