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 fluminensis Cruz, Salles and Hamada Callibaetis fluminensis Cruz et al. 2009 , p. 25 . Known stages: I ♀ ♂ ,N Diagnosis Male imago. (1) Dorsal portion of turbinate eyes oval (fig. 1 in Cruz et al. 2009 ); (2) forewing hyaline, except for brownish stigmatic area and small brownish marks along costal vein (fig. 3 in Cruz et al. 2009 ); (3) marginal intercalary veins paired, except between veins MP and A (fig. 3 in Cruz et al. 2009 ); (4) hind wing hyaline with five cross veins (fig. 4b in Cruz et al. 2009 ); (5) costal process of hind wing compound (fig. 4b in Cruz et al. 2009 ); (6) abdominal sterna with black mark anterolaterally; (7) forceps segment I wide at base and with small distomedial projection (fig. 31 in Cruz et al. 2009 ). Female imago. (1) Forewing hyaline, except C, Sc, R 1 and area around bulla brown coloured (fig. 7 in Cruz et al. 2009 ); (2) marginal intercalary veins paired, except between veins CuA and A (fig. 7 in Cruz et al. 2009 ); (3) hind wing hyaline, except brown mark at base toward costal process, with six cross veins (fig. 8b in Cruz et al. 2009 ); (4) costal process of hind wing compound (fig. 8b in Cruz et al. 2009 ); (5) abdominal sterna white with many red spots (fig. 9 in Cruz et al. 2009 ); (6) abdominal terga dark brown with red spots medially (fig. 32 in Cruz et al. 2009 ). Mature nymph. (1) Antenna with fine, simple setae on apex of each segment (fig. 10 in Cruz et al. 2009 ); (2) distal margin of labrum with subquadrangular small emargination (fig. 11a in Cruz et al. 2009 ); (3) lateral and anterolateral margin of labrum with long, fine, simple setae; (4) maxillary palp reaching apex of galea-lacinia (fig. 15 in Cruz et al. 2009 ); (5) glossa subequal in length to paraglossa (fig. 16a in Cruz et al. 2009 ); (6) labial palp with inner and outer margin with many robust, simple setae and many long, fine, simple setae (fig. 16a in Cruz et al. 2009 ); (7) anterior surface of forefemur with robust trifid and bifid spine-like setae near ventral margin (fig. 17b in Cruz et al. 2009 ); (8) fore tarsus dorsally with one or two short, robust, spine-like setae; ventrally two rows of long spine-like setae and one row of trifid spine-like setae (fig. 17a in Cruz et al. 2009 ); (9) anterior surface of hind femur with many robust, curved, pectinate setae near ventral and dorsal margin (fig. 18b,c in Cruz et al. 2009 ; (10) hind claw similar to foreclaw; (11) gill VII as long as length of segments VIII to IX, with two folds (fig. 23 in Cruz et al. 2009 ); (12) cerci with posterior margin of segments with short spines on each segment, and long spines on every three segments (fig. 25 in Cruz et al. 2009 ); (13) terminal filament similar to cerci (fig. 26 in Cruz et al. 2009 ). Material examined Female imago with corresponding nymphal exuviae, BRAZIL , Rio de Janeiro , Nova Friburgo , Lumiar ( 22 ◦ 23 ′ 27.2 ′′ S , 42 ◦ 20 ′ 03,6 ′′ W ), third order tributary of the Rio Bonito , pool, V / 2008 , Souza, M. R . col. ( INPA ). Ten nymphs, two male imagos same data, both reared (five nymphs and one male imago in INPA , others in DZRJ ) . Comments The male imagos of C. zonalis only have as useful diagnostic characteristic the alar pigmentation, which has large variation, matching with alar pigmentation of C. fluminensis male imago. This shared characteristic prevents the differentiation of these species at this stage. Distribution Brazil : Rio de Janeiro state , Nova Friburgo county.