Madecorphnus peyrierasi 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 : 54

Madecorphnus peyrierasi Frolov, 2010

( Figs. 27 A–F)

Madecorphnus peyrierasi Frolov, 2010c: 1109 .

Type material examined. Holotype ( Figs. 27 A–E), male, “ MADAGASCAR EST PERINET XI .1972 A.PEYRIERAS / Holotypus Madec. peyrierasi Frolov 2009 ” (MNHN).

Paratypes: one female with the same data as the holotype ( MNHN) ; one female, “ Madagascar East Perinet A.Peyrieras X-1972 ” ( MNHN) ; one male, “La Mandraka A. Peyrieras 25-III-1975 ” (MNHN); one male, “ Madagascar Est route d'Anosibe A. Peyrieras 6.IV.1975 ” ( MNHN) .

Diagnosis. This species is similar to M. perinetensis externally and in the shape of the internal sac armature, but can be separated from it by the different shape of the parameres and somewhat smaller eyes ( Figs. 27 A–B).

Description. Male. Body length 4.6–6.2 mm. Color uniformly brown, head slightly darker ( Fig. 27 A).

Right mandible about 1.7–1.2 times longer than left, without tooth behind apex. Labrum trapezoidal, length about 1/6 width (in dorsal view).

Frontoclypeus asymmetrical, slightly convex anteriorly, obtuse, with 2 long and 2 shorter setae on the anterior margin. Frontoclypeus slightly depressed in the middle anteriorly, finely punctate.

Pronotum 1.8 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 sparsely punctate with relatively large punctures. 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 tapering apically, acute in lateral view ( Fig. 27 B). Internal sac with 2 longer and 2 smaller sclerites ( Figs. 27 D, E).

Female. Females differ from males in having short subsymmetrical mandibles, long protibial spur, and wider elytra.

Distribution and habitat. Madecorphnus peyrierasi is known from one locality in Adringitra Massif, southeastern Madagascar ( Fig. 27 F).

Figures

FIGURE 27. Madecorphnus peyrierasi, 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).