Madecorphnus montreuili Frolov, 2010

details, Publication, authors, including instructions for, information, subscription, http, www. tandfonline. com, loi & tnah 20, 2010, Revision of the Madagascan genus Madecorphnus Paulian (Coleoptera: Scarabaeidae: Orphninae), Journal of Natural History 44 (17 - 18), pp. 1095-1111 : 1102

Madecorphnus montreuili Frolov , sp. nov.

( Figures 1, 9 , 21 , 31 )

Type material

Holotype, male. Antanambe, 25.I.1990 ( MNHN).

Description

Holotype. Body length 5.8 mm. Colour uniformly dark brown. Right mandible about 1.5 times longer than left, strongly curved, with a tooth behind apex ( Figure 1 ). Labrum trapezoidal, its length about 1/5 width (in dorsal view).

Clypeus slightly asymmetrical, slightly convex anteriorly, obtuse, with two long and a number of smaller setae. Genae very small, not protruding past eyes. Canthus and frontal suture indistinct. Clypeus somewhat depressed in the middle anteriorly, minutely punctate.

Pronotum 1.8 times wider than long, widest medially. Margins with relatively wide border, lateral margins with four long setae. Pronotum evenly convex, minutely punctate.

Elytra convex, with distinct humeral and apical calli. Maximum width approximately at basal third. 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 callus. Elytra punctate with sparse relatively large punctures in the middle of each elytron near stria one.

Anterior tibiae with three outer teeth, lateral margin basad of outer teeth not crenulate. Apex with robust, spur-like seta and a few smaller setae basally. Middle and posterior legs similar in shape. Longer tibial spur shorter than two basal tarsomeres in middle legs and shorter than three tarsomeres in posterior legs.

Aedeagus. Parameres symmetrical, relatively wide in dorsal view, with two distinct teeth laterally ( Figure 9 ). Internal sac with two large and one smaller sclerites ( Figure 21 ).

Diagnosis

This species differs from other Madecorphnus species in having 2 distinct tubercles on the mentum. It is similar to M. falculoides in having the right mandible with a tooth on inner side of scissorial part but differs from it in the shape of the mandibles and parameres.

Etymology

The species is named after Olivier Montreuil, a scarab beetle specialist at the Natural History Museum, Paris.

Figures

Figure 31. Madecorphnus spp., distribution map.

Figures 1–19. Madecorphnus spp. (1) Habitus and scheme of chaetotaxy; (2–7) head; (8–19) aedeagus in lateral view and parameres in dorsal view. (1, 9) M. montreuili sp. n.; (2, 12) M. punctatus sp. n.; (3, 8) M. falculoides; (4, 10) M. pauliani sp. n.; (5, 14) M. falcatus; (6, 18) M. perinetensis sp. n.; (7, 19) M. peyrierasi sp. n.; (13) M. dentatus sp. n.; (15) M. simplex sp. n.; (16) M. falciger; (17) M. brunneus sp. n. Note: Scale for Figures 8–19.

Figures 20–30. Madecorphnus spp., schematic representation of invaginated internal sac of aedeagus with armature. (20) M. falculoides; (21) M. montreuili sp. n.; (22) M. pauliani sp. n.; (23) M. punctatus sp. n.; (24) M. dentatus sp. n.; (25) M. simplex sp. n.; (26) M. falcatus; (27) M. falciger; (28) M. brunneus sp. n.; (29) M. perinetensis sp. n.; (30) M. peyrierasi sp. n. Note: Not to scale.