Harpagobaetis Mol 1986

Harpagobaetis Mol 1986: 63, Orth et al. 2000: 35, Salles & Lugo-Ortiz 2002: 155, Domínguez et al. 2006: 159, Falcão et al. 2010: 40, Falcão et al. 2011: 537.

Type-species: Harpagobaetis gulosus Mol, original designation.

Diagnosis. Male imago (Adapted from Falcão et al. 2010). 1) forewing with paired marginal intercalary veins (Fig. 10a in Falcão et al. 2010); 2) hind wing present, with two complete longitudinal veins (Figs 10b and 11 in Falcão et al. 2010); 3) costal projection of hind wing pointed, placed in the basal third of anterior margin, cross veins absent (Figs 10b and 11 in Falcão et al. 2010); 4) forceps three-segmented, segment I with bulbous base, segment III long, about 3.0× as long as wide (Fig. 12 in Falcão et al. 2010). Mature Nymph (Adapted from Domínguez et al. 2006). 1) antenna 1.5–2.0 × as long as head capsule (adapted); 2) frons without frontal keels (new); 3) clypeus reduced in length (Fig. 1D) (new); 4) labrum wider than long, width more than 2.0 × the length (Fig. 1D) (adapted); 5) superlinguae of hypopharynx with lateral expansion (Fig. 4A) (adapted); 6) mandibles long and narrow, incisor completely fused (Figs 3D, 3F) (adapted); 7) mandibles with molar shaped like an incisor (Figs 3D, 3F) (adapted); 8) canines of galea-lacinia long and slender (Fig. 3E) (adapted); 9) labium elongated (Fig. 4B) (adapted); 10) inner margin of labial palp segment II without distomedial projection (Fig. 4B); 11) hind wing pads present (new); 12) tarsal claws with two rows of triangular denticles increasing in size distally (adapted); 13) surface of abdominal terga without scales or scale-like setae (new); 14) gills on segments I–VII (Fig. 1C) (new); 15) paracercus as long as cerci (Fig. 1A).