Bothynus villiersi, Endrodi, 1968

Duarte, Paulo R. M., Grossi, Paschoal C. & Dupuis, Fabien, 2022, A taxonomic revision of the Bothynus villiersi Endrödi, 1968 species group (Coleoptera: Scarabaeidae: Dynastinae), Zootaxa 5093 (1), pp. 49-66 : 64

Identification key for adults of the Bothynus villiersi species group

1 Apex of the prosternal process conical in both sexes ( Fig. 4C ). If described, female with anterior pronotal border arched ( Fig. 8A )................................................................................................ 2

- Apex of the prosternal process rounded in both sexes ( Fig. 4D ). Anterior pronotal border of female sinuous ( Fig. 8B )......................................................... Bothynus belemensis Duarte, Grossi, & Dupuis , new species

2 Pronotal tubercle of male subtrapezoidal (truncate or bilobed at apex) ( Fig. 4A ). Tergite 8 of female with weakly produced internal plate ( Fig. 8E )................................................... Bothynus alvarengai Martínez, 1983

- Pronotal tubercle of male conical (rounded at apex) ( Fig. 4B ). Tergite 8 of female with strongly produced internal plate ( Fig. 8C–D ).............................................................................................. 3

3 Inner margin of the right paramere bearing a basal process ( Fig. 6D ). Tergite 8 of female with bilobed internal plate ( Fig. 8D )........................................................................ Bothynus horridus Endrödi, 1968

- Inner margin of the right paramere bearing a medial process ( Fig. 6B, H ). Tergite 8 of female parabolic ( Fig. 8C )......... 4

4 Apex of parameres elongate ( Fig. 6B ). Tergite 8 of female with a longitudinal sulcus at the internal plate ( Fig. 8C )................................................................................. Bothynus villiersi Endrödi, 1968

- Apex of parameres shortened ( Fig. 6H ). Female unknow.............. Bothynus spinophallicus (Ratcliffe & Cave, 2021)

Figures

FIGURE 4. Pronotal tubercle: A, Bothynus alvarengai Martínez, 1983; B, Bothynus horridus Endrödi, 1968. Prosternal process: C, Bothynus villiersi Endrödi, 1968; D, Bothynus belemensis new species. Arrows indicate tubercle bilobed in A, tubercle conical in B, prosternal process apex conical in C, and prosternal process apex rounded in D.

FIGURE 6. Aedeagus in lateral view and parameres in dorsal view, respectively: A–B, Bothynus villiersi Endrödi, 1968; C–D, Bothynus horridus Endrödi, 1968; E–F, Bothynus alvarengai Martínez, 1983; G–H, Bothynus belemensis new species. lmp = left medial process, rbp = right basal process, rmp = right medial process. Arrow indicating elongated parameres apex in B.

FIGURE 8. Female, detail of the anterior pronotal margin: A, Bothynus villiersi Endrödi, 1968; B, Bothynus belemensis new species. Female, internal view of the tergite 8: C, Bothynus villiersi Endrödi, 1968; D, Bothynus horridus Endrödi, 1968; E, Bothynus alvarengai Martínez, 1983; F, Bothynus belemensis. Arrows indicate arched margin in A, margin sinuous in B, and furrow in C. ip = internal plate.