Callibaetis

Cruz, Paulo Vilela, Salles, Frederico Falcão & Hamada, Neusa, 2017, Four new species of Callibaetis Eaton (Ephemeroptera: Baetidae), nymphal description of Callibaetis (Abaetetuba) fasciatus (Pictet) and keys for South American species of Callibaetis, Zootaxa 4250 (3), pp. 229-261 : 259

Key to identify nymphs of Callibaetis subgenera

1. Anterior surface of forefemur near ventral margin without trifid or bifid setae ( Fig. 19 A)................. Cunhaporanga

1’. Anterior surface of forefemur near ventral margin with trifid or bifid setae ( Fig. 15 B)................................2

2. Posterior surface of hind femur with two rows of curved and pectinated setae ( Fig. 19 F in Cruz et al. 2014)...... Callibaetis

2’. Posterior surface of hind femur without rows of curved and pectinated setae ( Fig. 15 E in Cruz et al. 2014)...............3

3. First segment of maxillary palp and labial palp without stout setae ( Figs 2 E and 2G)........................ Abaetetuba

3’. First segment of maxillary palp and labial palp with stout setae ( Figs 10 E)..................................... Aiso

Figures

FIGURE 2. Callibaetis (Abaetetuba) cochlea sp. nov. nymph. A. antenna; B. labrum (left v. v., right d. v.); C. right mandible; D. left mandible; E. maxilla; F. hypopharynx; G. labium (left v. v, right d. v.); H. detail of paraglossa apex. Black arrows: tufts of thin setae.

FIGURE 10. Callibaetis (Aiso) calophenigyn sp. nov. nymphs. A. antenna; B. labrum (left v. v., right d. v.); C. right mandible; D. left mandible; E. maxilla; F. hypopharynx; G. labium (left v. v., right d. v.)

FIGURE 15. Callibaetis (Callibaetis) molinerii sp. nov. nymph. A. foreleg; B. detail of anterior surface near ventral margin; C. details of tarsus near ventral margin; D. detail of foreclaw; E. detail of hind claw; F. detail of the trifid setae on foretarsus.

FIGURE 19. Callibaetis (Cunhaporanga) imperator sp. nov. nymph. A. foreleg; B. detail of foreclaw; C. detail of hind claw.