Madecorphnus brunneus Frolov, 2010

Frolov, Andrey V., Montreuil, Olivier & Akhmetova, Lilia A., 2016, Review of the Madagascan Orphninae (Coleoptera: Scarabaeidae) with a revision of the genus Triodontus Westwood, Zootaxa 4207 (1), pp. 1-93 : 50

Madecorphnus brunneus Frolov, 2010

( Figs. 25 A–F)

Madecorphnus brunneus Frolov, 2010c: 1108 .

Type material examined. Holotype ( Figs. 25 A–E), male, “ANDRINGITRA Est Anjavidilava 1850–1950 m 18- XII / 15-I-1971 / Holotypus Madecorphnus brunneus Frolov 2009 ” (MNHN).

Diagnosis. Madecorphnus brunneus is similar to M. perinetensis and M. peyrierasi but differs from them in having the parameres less acute in lateral view and in the different internal sac armature.

Description. Male. Body length 6.2 mm. Color brown, pronotum and head dark brown ( Fig. 25 A).

Right mandible about 2 times longer than left, without tooth basad of apex. Labrum trapezoidal, its length about 1/5 width (in dorsal view).

Frontoclypeus asymmetrical, slightly convex anteriorly, obtuse, with 2 long setae. Frontoclypeus slightly depressed in the middle anteriorly, finely punctate.

Pronotum 1.9 times wider than long, widest medially. Margins with relatively wide border, lateral margins with 4 long setae. Pronotum evenly convex, minutely punctate.

Elytra convex, with distinct humeral and apical tubercules. Maximum width approximately at basal 1/3. First stria distinct and reaching the apex of elytron, other striae indistinct. Disc of elytra with sparse punctation. Epipleura with long, sparse, brown setae. Base of elytra with border from scutellum to humeral callus.

Protibiae with 3 outer teeth, lateral margin basad of outer teeth not crenulate. Apex with robust, spur-like seta and a few smaller setae basally. Mesothoracic and metathoracic legs similar in shape. Longer tibial spur shorter than 2 basal tarsomeres in mesothoracic legs and as long as 2 tarsomeres in metathoracic legs.

Parameres acutely rounded in lateral view ( Fig. 25 B). Internal sac of the aedeagus with 1 longer sclerite and 1 smaller, somewhat bifurcated sclerite ( Figs. 25 D–E).

Female. Unknown.

Distribution and habitat. Madecorphnus brunneus is known from one locality in the Adringitra Massif, southeastern Madagascar ( Fig. 25 F).

Figures

FIGURE 25. Madecorphnus brunneus, holotype. Habitus in dorsal view (A), aedeagus in lateral view and parameres in dorsal view (B), labels (C), internal sac of aedeagus (D—photograph, E—schematic representation of armature), distributional records (F).