Dichotomius (Cephagonus) ingens (Luederwaldtı 1935)

Nunes, Rafael V. & Vaz-de-Mello, Fernando Z., 2019, Taxonomic revision of Dichotomius (Cephagonus) Luederwaldt 1929 and the taxonomic status of remaining Dichotomius Hope 1838 subgenera (Coleoptera: Scarabaeidae: Scarabaeinae: Dichotomiini), Journal of Natural History 53 (37), pp. 2231-2351 : 2328

Group 4: Dichotomius (Cephagonus) ingens (Luederwaldtı 1935) species group

Diagnosis. this species group is composed of brachypterous species – flightless species with atrophied hindwing and is revised in Nunes and Vaz-de-Mello 2016. The group is differentiated of other by the following combined characters: anterior portion of pronotal disc with two to four lobes; hindwing atrophied ( Figure 7 (h)); pronotum wider than elytra in dorsal view ( Figure 41 ); elytra strongly convex in lateral view and elytra lacking humeral callus.

Representatives. 4.1: D. ingens ; 4.2: D. darwini ; 4.3: D. manni ; 4.4: D. paresi ; 4.5: D. periotoi .

Figures

Figure 7. (a) Mandible of D. fissus (Harold), inc – incisory lobe (membranous), mo – molar lobe. (b) Maxilla and maxillary palp of same species, mxp – maxillary palp, ga – galea, las – lacinia. (c) Epipharynx of same species. (d) Labrum and labial palpomere of same species. (e) Ventral clypeal process of D. fissceps indicated by white arrow.(f) Antena of same species.esc – escapo, lam – lamella. (g) Macropterous hind wig of D. fissiceps. (h) Brachypterous hindwing of D. ingens.

Figure 41. (a) D. ingens, male dorsal habitus. (b) D. darwini, male paratype dorsal habitus; (c) D. paresi, male paratype dorsal view; (d) D. manni, male holotype dorsal view. (e) D. periotoi, male, paratype dorsal view.