Dichotomius (Selenocopris) benesi, Vaz-de-Mello & Nunes, 2016

Valois, Marcely C., Silva, Fernando A. B. & Vaz-de-Mello, Fernando Z., 2022, A taxonomic revision of the globulus species group of Dichotomius Hope, 1838 (Coleoptera: Scarabaeidae: Scarabaeinae), Journal of Natural History 56 (1 - 4), pp. 119-147 : 128-129

Dichotomius (Selenocopris) benesi Vaz-de-Mello and Nunes, 2016

( Figures 1 (a), 4(a–b), 5(b), and 6)

Dichotomius (Selenocopris) benesi Vaz-de-Mello and Nunes 2016: 295.

Diagnosis

Within the globulus group, only D. benesi and D. ocellatopunctatus are brachypterous species. They are associated with mountain formations; Vaz-de-Mello and Nunes (2016) provided detailed descriptions for both species, and illustrated the tegmen of D. benesi . Therefore, herein the description of D. benesi is merely complemented by the inclusion of the following characters of the male genitalia: in dorsal view, paramera rectangular, onethird longer than its width at medial portion; apex slightly obliqualy truncate; surface with a feeble pre-apical longitudinal carina, inner edge curved inward at basal third ( Figure 4 (a)); in lateral view, apical half of paramera approximately as wide as base; ventral sclerotised membrane between paramera thinner at basal half, slightly angulate laterally ( Figure 4 (b)). ME with two hook-like projections inferiorly, projections separated by a broad U-shaped emargination; ME with a longitudinal fold at the median inferior region ( Figure 5 (b)). Complex of A and A+SA endophallites thin, C-shaped in lateral view; SA endophallite with reticulate texture inferiorly ( Figure 5 (h), arrow). FLP endophallite C-shaped in lateral right view, inferior region thinner than superior one; surface of the C-shaped region with irregular projections ( Figure 5 (h)). SRP endophallite approximately J-shaped ( Figure 5 (h)).

Type material examined

Holotype of Dichotomius benesi ♂ [ CEMT]: ‘ Panama Veraguas Santa Fé’ /‘ 811 m 8°29 ʹ N 81° 06 ʹ W’ /‘ 16–18–VI–2013 ’/‘ V Benes lgt’ . Paratype [♀, MZUFPA]: same data as the holotype.

Figures

Figure 1. Dorsal habitus of male. (a) Dichotomius benesi; (b) D. berthalutzae sp. nov.; (c) D. femoratus; (d) D. fortepunctatus; (e) D. gamboaensis.

Figure 4. Tegmen, dorsal and ventral views,respectively. (a,b) Dichotomius benesi; (c,d) D. berthalutzae sp. nov.; (e,f) D. femoratus; (g,h) D. fortepunctatus; (i,j) D. gamboaensis. Scale bar: 500 µm

Figure 5. Endophallites. (a) Dichotomius benesi, endophallus with endophallites, dorsal view. Medial endophallite: (b) D. benesi; (c) D. berthalutzae sp. nov.; (d,e) D. femoratus; (f) D. fortepunctatus; (g) D. gamboaensis. Accessory endophallites: (h) D. benesi; (i) D. berthalutzae sp. nov.; (j) D. femoratus; (k) D. fortepunctatus; (l) D. gamboaensis. Abbreviations: FLP, fronto-lateral peripherical endophallite; A +SA, subaxial and axial endophallites; SRP, superior-right peripheral endophallite.