Callibaetis guttatus Navás, 1915

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 : 620-622

Callibaetis guttatus Navás

( Figure 12 )

Callibaetis guttatus Navás, 1915b ; Gillies, 1990; Da-Silva, 1991; Domínguez et al. 2006; Nieto, 2008, p. 232.

Callibaetis apicatus Navás, 1917, p. 189 .

Callibaetis bruchius Navás, 1920b, p. 55 .

Callibaetis zonatus Navás, 1929, p. 224 .

Known stages: I ♀ ♂, N

Diagnosis

Male imago. (1) Forewing hyaline or with sparse pigmentation (figs. 16, 20 in Nieto 2008); (2) marginal intercalary veins paired (fig. 16 in Nieto 2008); (3) hind wing hyaline, sometimes with pigmentation (figs. 17a, 21a in Nieto 2008); (4) costal process of hind wing pointed or compound (fig. 21a in Nieto 2008); (5) abdominal terga III, V and VII dorsally with two submedially oblique marks; (6) segment I of forceps wide at base (fig. 22 in Nieto 2008).

Female imago. (1) Forewing with five to six pigmented bands, sometimes with black marks near posterior margin ( Figure 12B ); (2) marginal intercalary veins paired ( Figure 12B ); (3) hind wing with pigmented basal half, sometimes with medial pigmentation ( Figure 12C ); (4) costal process of hind wing pointed or compound ( Figure 12C ); (5) abdominal sterna with anterolateral mark ( Figure 12D ); (6) abdominal terga III, V and VII dorsally with two submedially oblique marks ( Figure 12A ).

Mature nymph. (1) Anterior margin of labrum medially with small emargination (fig. 25a in Nieto 2008); (2) anterior margin of labrum with simple and bipectinate setae (fig. 25b in Nieto 2008); (3) maxillary palp subequal or shorter in length than galea-lacinia (fig. 29 in Nieto 2008); (4) glossa subequal in length than paraglossa; (5) forefemur with row of trifid spine-like setae (fig. 31 in Nieto 2008); (6) cerci with spines on every one segment (fig. 36 in Nieto 2008).

Comments

Da-Silva (1991), after analysing several specimens from the state of Rio de Janeiro, described their nymphs for the first time, and redescribed the females, although the specimens examined in this paper did not fit exactly the original description of C. guttatus , especially regarding the forewing colour pattern. According to Da-Silva (1991) this was due to an intra-specific variation. Nieto (2008) also described two pigmentation variations of C. guttatus , one of which is in accordance with Da-Silva (1991). However, when analysing specimens collected in the states of Rio de Janeiro, Espírito Santo and Ceará, we found no variation in the wings or body pigmentation. A detailed investigation of the body pigmentation pattern, together with the nymph morphology of all specimens classified as C. guttatus , will help to establish the diagnostic characters of this species and, perhaps, help to reveal species that are new to science.

The natural colour of the female is green, after fixation the body colour changed to yellowish, and in some females to reddish.

Material examined

Female imago, BRAZIL, Ceará, São Gonçalo do Amarante (3 ◦ 36 ′ 21.67 ′′ S, 38 ◦ 58 ′ 12.33 ′′ W), 14 / iv / 2008, Ferreira, N. col. ( DZRJ). Female imago (with exuviae), BRAZIL, Espírito Santo, Pinheiros, 02 / x / 2007, Rebio Córrego do Veado (18 ◦ 43 ′ 0.16 ′′ S, 39 ◦ 51 ′ 33.80 ′′ W), Salles, F.F. col. ( CZNC). Female imago (with exuviae), BRAZIL, Espírito Santo, Águia Branca (18 ◦ 58 ′ 43.20 ′′ S, 40 ◦ 44 ′ 19.16 ′′ W), 11 / ix / 2009, Cruz, P. V., Salles, F.F. col. ( CZNC). Female imago (with exuviae), BRAZIL, Espírito Santo, São Mateus (18 ◦ 43 ′ 0.16 ′′ S, 39 ◦ 51 ′ 33.80 ′′ W), 09 / ix / 2009, Campus Litorâneo Lake of UFES , Cruz, P. V . col. ( CZNC). Two female imagos, BRAZIL, Rio de Janeiro, Silva Jardim (22 ◦ 39 ′ 34.25 ′′ S, 42 ◦ 22 ′ 56.76 ′′ W), 16 / x / 1976, Santos, N.D. col. ( DZRJ). Female imago, BRAZIL, Rio de Janeiro, Marica (22 ◦ 55 ′ 8.73 ′′ S, 42 ◦ 49 ′ 5.83 ′′ W), 03 / vi / 1989, ( DZRJ). Female imago, BRAZIL, Rio de Janeiro, Marica (22 ◦ 55 ′ 8.73 ′′ S, 42 ◦ 49 ′ 5.83 ′′ W), Restinga, 03 / vi / 1988, Nessimian, J.L. col. ( DZRJ) .

Distribution

Argentina, Brazil: Rio de Janeiro state, Silva Jardim county and Marica county ; Espírito Santo state, São Mateus county and Águia Branca county ; Ceará state, São Gonçalo do Amarante county .

Figures

Figure 12. (colour online) Callibaetis guttatus. (A) female imago dorsal view; (B) female imago forewing; (C) female imago hind wing; (D) female imago ventral view.