Madecorphnus falcatus Paulian, 1992

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 : 43-45

Madecorphnus falcatus Paulian, 1992

(Figs. 21A–F)

Madecorphnus falcatus Paulian, 1992: 1971 ; Frolov 2010c: 1107, 2013a: 3.

Type material examined. Holotype (Figs. 21A–E), male, “ MADAGASCAR ANTANAMBE 25 /01/ 90 P. E.C. Foret PROG . MAG188-007 / Sissantobius falcatus n.sp. R. Paulian det. / HOLOTYPE” (MNHN).

Diagnosis. This is the largest known species of Madecorphnus with the body length reaching 7 mm. Also, it differs from other Madecorphnus species in having a distinctive shape of the parameres (Fig. 21B) and internal sac armature consisting of 2 small, bifurcate sclerites, 1 long spur-like sclerite, and numerous small spinules (Figs. 21D–E).

Description. Male. Body length 6.9–7.1 mm. Color dark brown (Fig. 21A).

Right mandible 2 times longer than left, without tooth behind apex. Labrum trapezoidal, feebly visible in dorsal view.

Frontoclypeus asymmetrical, slightly convex anteriorly, obtuse, with 2 long and a number of smaller setae. Frontoclypeus slightly depressed in the middle anteriorly, almost smooth.

Pronotum 1.6 times wider than long, widest medially. Margins with relatively wide border, lateral margins with 4 long setae. Pronotum evenly convex, with minute punctures.

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 and minute punctures between them.

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 as long as 2 basal tarsomeres in mesothoracic legs and shorter than 3 basal tarsomeres in metathoracic legs. Metafemora with a few pectinate setae on the inner side apically.

Parameres relatively long, their apices curved downwards (in lateral view), with small teeth laterally visible in apical view (Fig. 21B). Internal sac with 1 long, spur-shaped sclerite, 2 smaller, double sclerites, and a field small adjacent spinules (Figs. 21D–E).

Female. Unknown.

Distribution and habitat. Madecorphnus falcatus is known from two localities in eastern Madagascar (Fig. 21F).