Dichotomius (Cephagonus) ascanius (Harold)

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 : 2261

Group 1: Dichotomius (Cephagonus) ascanius (Harold) species-group

Diagnosis. recognised among other Cephagonus by the following combination of characters: males sixth ventrite strongly narrowed mediallyı with strong basal groove throughout its extension ( Figure 8 (c)); female sixth ventrite with ‘ U ’ -shape emargination at medial portion ( Figure 8 (d)); metasternum with irregular surface between punctures ( Figure 6 (a)) and clypeo-genal angle obtuse (over 110³) as in D. fissus and D. spadiceus groupsı however very small males and females have very subtle angulation or do not have any angulation at all.

Representatives. 1.1: D. ascanius ; 1.2: D. mundus ; 1.3: D. socius .

Figures

Figure 6. Distribution map of D. (S.) bicuspis.

Figure 8. (a) Part of D. ascanius ventral portion evidencing metasternum puncture, cox – coxae ely – elytra, mes – mesepisternum, met – metasternum. (b) Pygidium of D. reichei (c) abdominal ventrites of a male of D. ascaniusı (d) abdominal ventrites of a female of D. ascaniusı (e) abdominal ventrites of a female of D. sociusı (f) detail of the sixth ventrite of a female of D. Socius.