Orphnus (Phornus) parastrangulatus, Frolov & Akhmetova, 2016

Frolov, Andrey V. & Akhmetova, Lilia A., 2016, Revision of the subgenus Orphnus (Phornus) (Coleoptera, Scarabaeidae, Orphninae), European Journal of Taxonomy 241, pp. 1-20 : 13-15

Orphnus (Phornus) parastrangulatus sp. nov.

urn:lsid:zoobank.org:act:FDAC941D-8E3B-4496-A8BB-2A2E58BDBB2B

Figs 1Q , 5 A–H

Diagnosis

Orphnus parastrangulatus sp. nov. is most similar to O. strangulatus but can be separated from it in having a long transverse keel on frontoclypeus, relatively shorter pronotum and more rounded elytra, shorter and somewhat convex ventrally abdomen (in lateral view contour of abdominal sternites is somewhat curved).

Etymology

From Greek “παρά” and “strangulatus” for close relations with O. strangulatus .

Material examined

Holotype

TANZANIA: ♂, “ D. Ost-Afrika [Tanzania]” ( ZMHUB).

Description

Holotype ( Fig. 5A )

Body length 12.5 mm. Colour uniformly dark brown.

Anterior margin of frontoclypeus convex, rounded laterally, with a keel-shaped border ( Fig. 1 B–C). Frontoclypeus with low transverse carina approximately on the line connecting anterior margins of canthi. Frontoclypeus densely punctate anteriad and posteriad of the carina.

Eyes relatively large: width about 1/5.5 the distance between eyes in dorsal view.Antennae 10-segmented, without malformed segments.

Pronotum widely rounded laterally, narrower than elytra, 1.8 times wider than length, 0.5 length of elytra ( Fig. 1Q ). Anterior border wide, with almost smooth posterior margin. Basal border narrow, keel-shaped, separated from pronotal disc by a smooth groove. Pronotal disc anteromedially slightly flattened. Surface of pronotum covered with double puncturation composed of large rounded and minute punctures; large punctures cover sides of the pronotum and area near anterior border.

Scutellum narrowly rounded apically, about 1/16 the length of elytra.

Elytra about as wide as long, with feeble marked humeral humps. Elytra widest approximately in the middle, with widely rounded lateral margins. First six striae faintly visible as very shallow grooves, without distinct rows of punctures. Elytra covered with sparse punctures becoming slightly coarser towards base.

Brachypterous. Wings vestigial, narrow, about ¾ the length of elytra.

Stridulatory field: carinae separated by 1/30 length of the field in central ¼ rd ( Fig. 5H ).

Abdomen 1.4 times wider than long (measured in ventral view from anterolateral margins of sternite 2 to apex of pygidium). Abdominal sternite 8 medially about as long as sternites 5–7 combined; sternite 7 very narrow medially. Pygidium visible from above, with rounded apex. Plectrum trapezoidal, elongated, with widely rounded apex ( Fig. 5G ). Lateral plate of abdominal sternite relatively small, shorter than plectrum, with rounded apex.

Aedeagus with relatively long parameres (0.5 length of phallobase), without excavations. Apices of the parameres rounded in dorsal and lateral view ( Fig 5 D–E).

Female

Unknown.

Distribution

The only type specimen lacks precise information of the collecting locality except for a reference to “Deutsch Ostafrika”, the area corresponding to modern Tanzania, Burundi and Rwanda.

Figures

Fig. 1. — A–M. Orphnus giganteus Paulian, 1948. A–B. Habitus. C–D. Head in dorsal and apical view. E–G. Antennae. H. Aedeagus in lateral view. I. Parameres in dorsal view. J. Abdomen in dorsal view. K–L. Stridulatory field. M. Habitus. — N. O. renaudi sp. nov., holotype, habitus. — O. O. ferrierei sp. nov., holotype, habitus. — P. O. valeriae sp. nov., holotype, habitus. — Q. O. parastrangulatus sp. nov., holotype, habitus. — R. O. strangulatus Paulian, 1948, habitus. M–R = not to scale.

Fig. 5. — A–H. O. parastrangulatus sp. nov. A. Habitus. B–C. Head in dorsal and apical view. D. Aedeagus in lateral view. E. Parameres in dorsal view. F. Label of holotype. G. Abdomen in dorsal view. H. Stridulatory field. — I–P. O. strangulatus Paulian, 1948. I. Habitus. J–K. Head in dorsal and apical view. L. Aedeagus in lateral view. M. Parameres in dorsal view. N. Label of holotype. O. Abdomen in dorsal view. P. Stridulatory field. A–H, I, N. Holotypes.