Madecorphnus falculoides ( Paulian, 1977 )

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 : 24

Madecorphnus falculoides ( Paulian, 1977)

( Figs. 9 A–G)

Sissantobius falculoides Paulian, 1977: 1203 .

Madecorphnus falculoides: Paulian 1992: 169 ; Frolov 2010c: 1100.

Type material examined. Holotype ( Figs. 9 A–B, D–F), male, “ MADAGASCAR Ouest : Antsalova, Antsingy. R.N. 9 I-1975 A. Peyrieras / Sissantobius falculoides n. sp. R.Paulian det. / HOLOTYPE ” ( MNHN) .

Paratypes: one male and four females with the same locality data as the holotype ( MNHN) .

Diagnosis. This species can be distinguished from other Madecorphnus species in having the right mandible with acute tooth on inner side of scissorial part ( Fig. 9 A), distinctive shape of the parameres ( Fig. 9 B) and internal sac armature ( Figs. 9 E–F).

Description. Male. Body length 5.0 mm. Color uniformly dark brown to black.

Right mandible slender, about 1.4 times longer than left, slightly curved, with a slender, long tooth in the middle ( Fig. 9 A). Labrum trapezoidal, feebly visible in dorsal view.

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

Pronotum 1.5 times wider than long, widest medially. Margins with relatively wide border, lateral margins with 4 long setae. Pronotum evenly convex, finely 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 setae. Base of elytra with border from scutellum to humeral callus. Elytra punctate with sparse, relatively large punctures with minute punctures in between. Elytra with 2 longitudinal stria each, appearing as double lines on the disc of elytron; lateral striae less distinct as medial stria.

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 shorter than 3 tarsomeres in metathoracic legs.

Parameres symmetrical, narrow and tapering in dorsal view, with 2 small lateral teeth not visible in dorsal view ( Fig. 9 B). Internal sac with 2 large double sclerites and large area of relatively robust adjacent spinules ( Figs. 9 E– F).

Female. Female ( Fig. 9 C) differs from the male in having short subsymmetrical mandibles, long protibial spur, and relatively wider elytra.

Distribution and habitat. This species is known from one locality in western Madagascar ( Fig. 9 G).

Figures

FIGURE 9. Madecorphnus falculoides. Habitus in dorsal view (A—male, C—female), aedeagus in lateral view and parameres in dorsal view (B), labels of holotype (D), internal sac of aedeagus (E—photograph, F—schematic representation of armature), distributional records (G).