Callibaetis radiatus Navás, 1920

Cruz, Paulo Vilela, Salles, Frederico Falcão & Hamada, Neusa, 2013, Callibaetis Eaton (Ephemeroptera: Baetidae) from Brazil, Journal of Natural History (J. Nat. Hist.) 48 (11 - 12), pp. 591-660 : 648-650

Callibaetis radiatus Navás

( Figure 26 )

Callibaetis radiatus Navás, 1920a ; Gillies, 1990; Salles et al., 2003, p. 13; Domínguez et al., 2006, p. 116.

Callibaetis venulosus Navás, 1932, p. 114 .

Known stages: I ♀ ♂, N

Diagnosis

Male imago. (1) Dorsal portion of turbinate eyes oval ( Figure 26A ); (2) forewing hyaline ( Figure 26D ); (3) marginal intercalary veins single ( Figure 26D ); (4) base of subcostal vein with small light brown spot ( Figure 26D ); (5) costal process of hind wing compound ( Figure 26E ); (6) segment I wide at base, segment III of forceps truncated ( Figure 26C ).

Female imago. (1) Forewing veins C, Sc and R 1 areas brown pigmented ( Figure 26G ); (2) marginal intercalary veins single ( Figure 26G ); (3) hind wing hyaline ( Figure 26H ); (4) costal process of hind wing compound ( Figure 26H ); (5) abdominal sterna with black anterolateral marks ( Figure 26I ).

Mature nymph. (1) Labrum with small medial emargination (fig. 1 in Salles et al. 2003); (2) distal margin of labrum with long and simple spine-like setae (fig. 1 in Salles et al. 2003); (3) maxillary palp subequal in length of galea-lacinia; (4) glossa subequal in length than paraglossa; (5) forefemur with short spine-like setae near ventral and dorsal margin (fig. 8 in Salles et al. 2003).

Comments

The imagos of C. radiatus can be distinguished from other species in the genus by the costal process truncated on hind wing.

Material examined

Male imago and female imago (reared), BRAZIL, Minas Gerais, Viçosa, Ranário – Universidade Federal de Viçosa , 27 / i / 1997, Silva, E. R . col. ( CZNC). Female imago (reared), BRAZIL, Minas Gerais, Viçosa, Ranário – Universidade Federal de Viçosa , 18 / i / 1997, Silva, E. R . col. ( CZNC).

Distribution

Argentina, Paraguay and Brazil: Minas Gerais state, Viçosa county.

Figures

Figure 26. (colour online) Callibaetis radiatus. (A) male imago dorsal view; (B) male imago lateral view; (C) genitalia; (D) male imago forewing; (E) detail of male imago hind wing; (F) female imago dorsal view; (G) female imago forewing; (H) detail of female imago hind wing; (I) female imago ventral view.