Callibaetis Eaton (Ephemeroptera: Baetidae) from Brazil Author Cruz, Paulo Vilela Programa de Pós-graduação em Entomologia, Instituto Nacional de Pesquisas da Amazônia (INPA), CEP 69060 - 001, Manaus, Amazonas, Brazil; Author Salles, Frederico Falcão Universidade Federal do Espírito Santo, CEP 29933 - 415 São Mateus, Espírito Santo, Brazil; Author Hamada, Neusa Coordenação de Pesquisas em Entomologia (CPEN), Instituto Nacional de Pesquisas da Amazônia (INPA), CEP 69060 - 001, Manaus, Amazonas, Brazil text Journal of Natural History 2013 J. Nat. Hist. 2014-01-20 48 11 - 12 591 660 https://www.mendeley.com/catalogue/92521cd9-194d-3cbf-906c-7301d6990ad9/ journal article 10.1080/00222933.2013.791883 1464-5262 5198763 Callibaetis willineri Navás Callibaetis willineri Navás, 1933 ; Gillies, 1990 ; Domínguez et al., 2006 ; Nieto, 2008 , p. 240 . Callibaetis alegre Traver, 1944 , p. 46 . Known stages: I ♀ ♂ , N Diagnosis Male imago. (1) Wings hyaline; (2) marginal intercalary veins paired; (3) costal process of hind wing rounded; (4) abdominal sterna with one blackish mark anterolaterally. Female imago. (1) Forewing hyaline, except C, Sc, R 1 areas, pigmentation near or touch R 2 (fig. 73 in Nieto 2008 ); (2) marginal intercalary veins paired (fig. 73 in Nieto 2008 ); (3) costal process of hind wing rounded (fig. 74b in Nieto 2008 ); (4) abdominal sterna covered with red spots. Mature nymph. (1) Distal margin of labrum with small, subquadrangular medial emargination (fig. 76a in Nieto 2008 ); (2) distal margin of labrum with simple spine-like setae (fig. 76b in Nieto 2008 ); (3) maxillary palp subequal in length to galealacinia (fig. 80 in Nieto 2008 ); (4) glossa subequal in length than paraglossa; (5) trifid spine-like setae near ventral margin of forefemur; (6) cerci with short spines on all segments (Figure 87 in Nieto 2008 ); (7) terminal filament with spines on all segments. Material examined No types or specimens were examined; the diagnosis was based on the literature. Distribution Argentina , Uruguay and Brazil : Rio Grande do Sul state , Porto Alegre county.