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 ) sellacki ( Weyenbergh 1883 ) ( Figs. 15 A–16B) Cloe sellacki Weyenbergh 1883 : 164 . (comb. by Eaton 1883 ) Cloe lorentzii Weyenbergh 1883 : 167 . (syn. by Gillies 1990 ) Callibaetis sellacki Eaton 1883 : 198 ; Gillies 1990 : 27 ; Nieto 2008 : 237 ; Domínguez et al. 2006 : 116 ; Cruz et al. 2014: 60. Callibaetis trifasciatus (partim) Navás 1915b : 120 . (misidentification, the name is not syn. Gillies 1990 ; McCafferty 1996 ) Callibaetis fasciatus Ulmer 1921 : 246 . (misidentification, the name is not syn. Gillies 1990 ) Callibaetis lineatus Navás 1932 : 82 . (syn. by Gillies 1990 ) Baetis gloriosus Navás 1923 : 2 . syn. nov. Callibaetis gloriosus Navás 1930b : 360 . syn. nov. (comb. by Navás 1930b ) FIGURE 15. Callibaetis ( Abaetetuba ) sellacki nymphs. A. dorsal view; B. ventral view. FIGURE 16. Callibaetis gloriosus female subimago syn. nov. (holotype). A. label of type; B. dorsal view. Known stages. I ♀♂, N Diagnosis. Male imago: 1) dorsal portion of turbinate eyes oval (Fig. 173 in Cruz et al. 2014); 2) dorsal portion of turbinate eyes in lateral view without constriction; 3) dorsal portion of turbinate eyes stalk height 0.21 × height of dorsal portion; 4) turbinate portion of compound eyes (in lateral view) with anterior and posterior margins divergent; 5) forewing with two brown bands, apical band parallel to posterior margin (Fig. 176 in Cruz et al. 2014); 6) marginal intercalary veins paired (Fig. 176 in Cruz et al. 2014); 7) hind wing with small marks of pigmentation (Fig. 177 in Cruz et al. 2014); 8) costal process of hind wing pointed (Fig. 177 in Cruz et al. 2014); 9) marginal intercalary veins on hind wing present (Fig. 177 in Cruz et al. 2014); 10) abdominal sterna with pair of medioanterior and medioposterior sigilla strongly pigmented; 11) abdominal sterna washed with red spots and with one anterolateral mark; 12) forceps segment I wide at base (Fig. 175 in Cruz et al. 2014); 13) forceps segment III elongate (Fig. 175 in Cruz et al. 2014). Female imago: 1) forewing with two bands, apical band parallel to posterior margin (Fig. 179 in Cruz et al. 2014); 2) marginal intercalary veins paired (Fig. 179 in Cruz et al. 2014); 3) hind wing with small marks of pigmentation (Fig. 180 in Cruz et al. 2014); 4) costal process of hind wing pointed (Fig. 180 in Cruz et al. 2014); 5) marginal intercalary veins on hind wing present (Fig. 180 in Cruz et al. 2014); 6) abdomen covered by red spots (Figs. 178 and 181 in Cruz et al. 2014); 7) abdominal sterna with pair of medioanterior and medioposterior sigilla strongly pigmented (Fig. 181 in Cruz et al. 2014). Mature nymph: 1) distal margin of labrum medially with simple spine-setae (Fig. 61B in Nieto 2008 ); 2) maxillary palp 1.5 × the length of galea-lacinia (Fig. 65 in Nieto 2008 ); 3) crown of galea-lacinia with two rows of setae; 4) paraglossa with rounded apex (Fig. 66A in Nieto 2008 ); 5) paraglossa with one tuft of fine and simple setae on apex; 6) metanotum with spines; 7) foretarsus anterior surface with spine-like setae (Fig. 67 in Nieto 2008 ); 8) hind claw denticles smaller than foreclaw denticles (Fig. 69 in Nieto 2008 ). Comments. Until now, C. gloriosus is considered to be a junior synonym of Callibaetis ( A. ) fasciatus . After studying the type of C. gloriosus , we observed that the most conspicuous diagnostic character of C. ( A. ) sellacki is present in C. gloriosus : an apical band on the female forewing, parallel to the posterior margin. Thereby, C. gloriosus is proposed here as junior synonym of C. ( A. ) sellacki . The type specimens of C. gloriosus possess damaged forewings ( Fig. 16 B), but the apical band is visible and comparable with those presented by Cruz et al. (2014: Figs. 27D, 27G). We present figures of the dorsal and ventral habitus of the nymphs of C. ( A. ) sellacki ( Figs. 15 A–15B) and the type of C. gloriosus ( Figs. 16 A–16B). Material examined. Callibaetis gloriosus , female subimago ( type ), CHILE , Marga-Marga , Ian 1919, MZB ; Callibaetis lineatus , female imago ( type ), CHILE , Marga Marga , iii.1931 , MZB ; Callibaetis trifasciatus , male imago ( type ), ARGENTINA , Prov. Buenos Aires , C. Bruch coll., MZB ; two nymphs (one mounted on slides), ARGENTINA , Buenos Aires , Tandil, A ◦ Quequén Chico , 6.i.1983 , E. Domínguez coll., INPA ; one male subimago, BRAZIL , Rio Grande do Sul state, Pelotas municipality, 10.xi.1959 , Biezanko, M. 1960-3, NHM . Distribution. Argentina : Bueno Aires. Chile : Marga-Marga. Brazil : Rio Grande do Sul ; São Paulo .