Additions and corrections to the systematics of mayfly species assigned to the genus Callibaetis Eaton 1881 (Ephemeroptera: Baetidae) from South America Author Cruz, Paulo Vilela Author Salles, Frederico Falcão Author Hamada, Neusa text Zootaxa 2017 4231 4 500 534 journal article 36559 10.11646/zootaxa.4231.4.2 fb0a7416-8d2e-4793-9dc3-525ffccb9e62 1175-5326 292674 99D539A1-D4BF-48C4-AEE1-0CA8F198C631 Callibaetis ( Abaetetuba ) capixaba Cruz, Salles & Hamada 2009 ( Figs. 2 A–2G) Callibaetis capixaba Cruz, Salles & Hamada 2009 : 31 ; Cruz et al. 2014:11. Known stages: I ♀♂, N Diagnosis. Male imago: 1) dorsal portion of turbinate eyes oval ( Fig. 2 A); 2) dorsal portion of turbinate eyes in lateral view without constriction; 3) dorsal portion of turbinate eyes stalk height 0.9 × height of dorsal portion; 4) turbinate portion of compound eyes (in lateral view) with anterior and posterior margins divergent; 5) forewing hyaline (Fig. 29 in Cruz et al. 2009 ); 6) marginal intercalary veins paired (Fig. 29 in Cruz et al. 2009 ); 7) hind wing hyaline (Fig. 30 in Cruz et al. 2009 ); 8) costal process of hind wing rounded (Fig. 30 in Cruz et al. 2009 ); 9) marginal intercalary veins on hind wing absent (Fig. 30 in Cruz et al. 2009 ); 10) abdominal sterna with pair of medioanterior and medioposterior sigilla weak pigmented ( Fig. 2 B); 11) abdominal sterna light brown with many red spots and two red marks, one lateral and other sublateral on anterior margin ( Fig. 2 B); 12) forceps segment I wide at base ( Fig. 2 F); 13) forceps segment III oval ( Fig. 2 F). Female imago: 1) forewing hyaline (Fig. 33 in Cruz et al. 2009 ); 2) marginal intercalary veins paired (Fig. 33 in Cruz et al. 2009 ); 3) hind wing hyaline (Fig. 34 in Cruz et al. 2009 ); 4) costal process of hind wing rounded (Fig. 34 in Cruz et al. 2009 ); 5) marginal intercalary veins on hind wing absent (Fig. 34 in Cruz et al. 2009 ); 6) abdominal sterna with pair of medioanterior and medioposterior sigilla weak pigmented ( Fig. 2 D); 7) abdominal sterna reddish brown with many red spots and two red marks, one lateral and other sublateral on anterior margin ( Fig. 2 D). Mature nymph: 1) distal margin of labrum medially with long, fine and apically bifid setae ( Fig. 2 G); 2) maxillary palp reaching apex of galea-lacinia (Fig. 41B in Cruz et al. 2009 ); 3) two rows of setae on basal part of inner-dorsal row of maxilla; 4) paraglossa subrectangular with apex truncated (Fig. 42A in Cruz et al. 2009 ); 5) paraglossa with three tufts of fine and simple; 6) metanotum with spines; 7) foretarsus anterior surface without spine-like setae (Fig. 43A in Cruz et al. 2009 ); 8) hind claw with minute denticles (Fig. 44B in Cruz et al. 2009 ). Comments. Many species of the genus Callibaetis have a history of poor, inaccurate, or even absent, illustrations. In order to maximize the possibility of a reliable identification, here we present photographs of the complete dorsal and ventral habitus of the male and female imagoes ( Figs. 2 A–2D), a photograph of the ventral view of the male genitalia, mounted on a slide ( Fig. 2 F), photographs of the dorsal habitus of the nymphal exuviae ( Fig. 2 E) and a detailed illustration of the labrum (dorsal and ventral views) ( Fig. 2 G). For more, see morphological comments under C. ( A. ) pollens . Material examined. Callibaetis capixaba , female imago with corresponding nymphal exuviae ( holotype ), BRAZIL , Espírito Santo , Santa Teresa , 19°52’30.9” S / 40°32’07.4” W , pool, sand, 26.x.2008 , F.F. Salles coll., INPA ; one male imago (reared), 20 nymphs, BRAZIL , Espírito Santo State, Santa Teresa Municipality , 19° 52' 30.9'' S / 40° 32' 07.4' 'W, pool, sand, 26.x.2008 , F.F. Salles coll., CZNC ; one male imago and one female imago (both reared), Espírito Santo , Santa Teresa , Reserva Biológica Augusto Ruschi , 19°55’30.1” S / 40°33’21.9” W , pool, sand, 26.ii.2009 , F.F. Salles coll., INPA ; one female imago, Santa Catarina , Vargem Bonita , 26°53’48.27” S / 51°42'12.24” W , 2005, E. Raimundi coll., CZNC . Distribution. Brazil : Espírito Santo ; Santa Catarina .