Madecorphnus falciger ( Lansberge, 1886 )

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 : 45-46

Madecorphnus falciger ( Lansberge, 1886)

( Figs. 22 A–E)

Drepanognatus falciger Lansberge, 1886: 93 .

Sissantobius falciger (Lansberge) : Paulian 1937: 140, 1977: 1203. Madecorphnus falciger (Lansberge) : Frolov 2010c: 1107; Paulian 1992: 171.

Type material examined. Holotype ( Figs. 22 A–E), male, “ Sissantobius Rits. ? falciger Lansb. Madag. ”, Ex- Musaeo VAN LANSBERGE / G.J.Arrow vidit 1908 / MUSEUM PARIS 1952 COLL. R. OBERTHÜR / Sissantobius falciger Lansb. HOLOTYPE” (MNHN).

Diagnosis. This species differs from other Madecorphnus species in having a characteristic shape of the parameres ( Fig. 22 B) and armature of the internal sac of the aedeagus consisting of 2 large, semicircular sclerites; 1 short, spur-like sclerite; and numerous small spinules ( Figs. 22 D–E).

Description. Male. Body length 6.0 mm. Color brown ( Fig. 22 A).

Right mandible 2.5 longer than left, without tooth behind apex. Labrum trapezoidal, length about 1/5–1/6 width (in dorsal view).

Frontoclypeus asymmetrical, slightly convex anteriorly, obtuse, with 2 long and a number of smaller setae. Canthus and frontal suture indistinct. Frontoclypeus slightly depressed in the middle anteriorly, punctate.

Pronotum 2 times wider than long, widest medially. Margins with relatively wide border, lateral margins with 4 long setae. Pronotum evenly convex, sparsely 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. Epipleura with long, sparse, brown setae. Base of elytra with border from scutellum to humeral humps. Elytra sparsely punctate with relatively large punctures.

All legs of the holotype are broken with only the right profemur, left mesofemur, right mesofemur and mesotibia, and half of right metafemur remaining.

Parameres angulate apically (in lateral view), with small but distinct teeth laterally ( Fig. 22 B). Internal sac with 2 large semicircular sclerites, 1 short spur-like sclerite and numerous small spinules ( Figs. 22 D–E).

Female. Unknown.

Distribution and habitat. The only known specimen of this species lacks any precise record of the locality where it was collected.

Figures

FIGURE 22. Madecorphnus falciger, 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).