Callibaetis gonzalezi (Navás)

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 : 617-619

Callibaetis gonzalezi (Navás)

( Figure 11 )

Cloeon gonzalezi Navás, 1934, p. 27 .

Callibaetis gonzalezi Gillies, 1990 ; Nieto, 2008; Domínguez et al., 2006, p. 113.

Known stages: I ♀ ♂, N

Diagnosis

Male imago. (1) Dorsal portion of turbinate eyes oval ( Figure 11A ); (2) forewing hyaline ( Figure 11E ); (3) marginal intercalary veins single ( Figure 11E ); (4) hind wing hyaline; (5) costal process of hind wing rounded ( Figure 11F ); (6) abdominal sterna white, with anterolateral brown mark in each segment; (7) forceps segment I wide at base ( Figure 11C ).

Female imago. (1) Forewing with yellowish green pigmentation at C, Sc, R 1 areas and wing base ( Figure 11H ) (only yellowish in alcohol); (2) marginal intercalary veins single ( Figure 11H ); (3) hind wing with 13–15 cross veins, basal half yellowish green ( Figure 11I ) (yellowish brown in alcohol) ( Figure 11J, K ); (4) hind wing with costal process rounded ( Figure 11J ); (5) abdominal sterna with one dark mark anterolaterally ( Figure 11L ); (6) abdominal terga green (yellowish brown in alcohol).

Mature nymph. (1) Antenna with spines; (2) anterior margin of labrum medially with subquadrangular small emargination (fig. 4 in Nieto 2008), setae of distal margin of labrum long and pointed; (3) maxillary palp scarcely longer than galea-lacinia (fig. 8 in Nieto 2008); (4) glossa subequal than paraglossa; (5) forefemur ventrally with trifid setae (fig. 10 in Nieto 2008) (6) foretarsus ventrally with trifid setae; (7) hind femur with curved and pectinate setae near ventral margin; (8) cerci with spines in all segments (fig. 15 in Nieto 2008); (9) terminal filament with spines in all segments.

Description

Male imago. Length: body, 4.8 mm; forewing, 5.6 mm; hind wing, 4.8 mm; antenna, 1 mm; tibia I, 1.3 mm; tibia II, 1 mm; tibia III, 1 mm; (n = 1). Head ( Figure 11A, B ). Coloration light orange. Turbinate portion of compound eyes orange. Antenna white. Dorsal portion of turbinate eyes oval; length 1.5 × width; stalk height 0.5 × dorsal portion height; inner margins parallel, not reaching each other. Thorax ( Figure 11A, B ). Anteronotal protuberance, mesoscutum, submesoscutum, posterior scutal protuberance and scutellum white. Anteronotal protuberance rounded. Metascutellar protuberance pointed. Legs: White. Leg I: tibia 1.1 × length of femur; tarsus 1.2 × length of femur. Leg II and III: tibia 0.6 × length of femur; tarsi 0.3 × length of femur. Wings. Forewing hyaline ( Figure 11E ), C and Sc areas opaque; veins white; stigmatic area with three to four cross veins touching subcostal vein and three to four veins not touching subcostal vein; marginal intercalary veins single, except between veins R 1 and R 2; length of each intercalary vein 0.3–0.7 × distance between adjacent longitudinal vein; length of forewing about 2.6 × width. Hind wing hyaline ( Figure 11F ); with seven to nine cross veins, one marginal intercalary vein; costal process rounded. Abdomen. Terga white; tracheation black. Sterna white, with anterolateral brown mark in each segment. Caudal filaments white. Genitalia ( Figure 11C ). Forceps white, segment I wide at base; 0.3 × length of segment II; distance between base of forceps 0.2 × distance between lateral margins of forceps. Forceps segment III apically truncate, 1.8 × as long as wide; 0.1 × length of segment II. Posterior margin of subgenital plate with small rounded projection.

Comments

The nymphs of C. gonzalezi and C. cruentus sp. nov. are similar, they can be distinguished by differences in the distal margin of labrum, which in C. gonzalezi is straight (fig. 4 in Nieto 2008) and in C. cruentus sp. nov. it is rounded ( Figure 6B ); the segments of maxillary palp in C. gonzalezi are subequal (fig. 8 in Nieto 2008) whereas in C. cruentus sp. nov. the second segment is shorter (0.6 ×) than the first ( Figure 6F ); abdominal segments V, VII and VIII with two parallel pale bands in C. gonzalezi (fig. 3 in Nieto 2008) whereas in C. cruentus sp. nov. these pale bands are absent ( Figure 8A ). The female natural colour is green ( Figure 11D ), after fixation the body colour changed to yellowish.

Material examined

Nine nymphs, BRAZIL, Rondônia, Porto Velho, Igarapé da Penal (8 ◦ 43 ′ 22.10 ′′ S, 63 ◦ 51 ′ 12.45 ′′ W), 21 / vii / 2006, P. V. Cruz col. ( INPA, CZNC). Two female imagos, BRAZIL, Rondônia, Porto Velho, Igarapé da Penal (8 ◦ 43 ′ 22.10 ′′ S, 63 ◦ 51 ′ 12.45 ′′ W), 23 / ii / 2007, P. V. Cruz col. ( INPA, UNIR). Female imago, BRAZIL, Rondônia, Porto Velho, Rio Madeira (8 ◦ 45 ′ 42.61 ′′ S, 63 ◦ 54 ′ 07.10 ′′ W), 14 / iv / 2007, P. V. Cruz col. ( INPA). Female imago, BRAZIL, Bahia, Jequié (13 ◦ 51 ′ 3.76 ′′ S, 40 ◦ 4 ′ 52.22 ′′ W), 22 / i / 2005, L. R. C. Lima col. ( INPA). 39 nymphs, female imago (reared), three female imagos, male imago, BRAZIL, Amazonas, Manaus, Catalão Lake (3 ◦ 06 ′ 54.73 ′′ S, 59 ◦ 54 ′ 33.85 ′′ W), macrophyte, 07 / vii / 2008, P. V. Cruz col. ( INPA). 42 nymphs, BRAZIL, Amazonas, Manaus, Catalão Lake (3 ◦ 06 ′ 54.73 ′′ S, 59 ◦ 54 ′ 33.85 ′′ W), macrophyte, 10 / vii / 2008, P. V. Cruz col. ( INPA). Female imago (reared), male subimago (reared), male imago (reared), 29 nymphs, two female imagos (reared), male imago (reared), BRAZIL, Amazonas, Manaus, Catalão Lake (3 ◦ 06 ′ 54.73 ′′ S, 59 ◦ 54 ′ 33.85 ′′ W), macrophyte, 11 / vii / 2008, P. V. Cruz col. ( INPA). Female imago, BRAZIL, Amazonas, Manaus, Rio Negro (3 ◦ 06 ′ 54.73 ′′ S, 59 ◦ 54 ′ 33.85 ′′ W), 20 / viii / 2008, P. V. Cruz col. ( INPA) .

Distribution

Argentina, Paraguay and Brazil: Rondônia state, Porto Velho county; Amazonas state, Manaus county; Bahia state, Jequié county.

Figures

Figure 6. Callibaetis cruentus sp. nov. Nymph: (A) antenna; (B) labrum (left v.v.; right d.v.); (C) right mandible; (D) left mandible; (E) hypopharynx; (F) maxilla; (G) labium (left d.v.; right v.v.); (H) labial palp d.v.

Figure 8. (colour online) Callibaetis cruentus sp. nov. Nymph: (A) dorsal body view (exuviae); (B) posterior margin of abdominal tergum IV; (C) fold I of gill I; (D) fold II of gill I; (E) fold III of gill I; (F) gill IV; (G) gill VII; (H) paraproct; (I) cercus; (J) terminal filament.

Figure 11. (colour online) Callibaetis gonzalezi. (A) male imago dorsal view; (B) male imago lateral view; (C) genitalia; (D) female imago lateral view of head and half thorax with natural color pattern; (E) male imago forewing; (F) male imago hind wing; (G) female imago dorsal view; (H) female imago forewing; (I) female imago hind wing; (J) detail of female imago hind wing; (K) variation of female imago hind wing; (L) female imago ventral view.