Xyloctonus bimarginatus Eggers, 1939

Jordal, Bjarte H., 2024, Integrated taxonomy, biology and biogeography of the Afrotropical genus Xyloctonus (Coleoptera, Curculionidae, Scolytinae), Deutsche Entomologische Zeitschrift 71 (1), pp. 67-84 : 67

Xyloctonus bimarginatus Eggers, 1939

Figs 34 , 37 , 40

Xyloctonus bimarginatus Eggers, 1939: 17.

Type material.

Holotype: [Democratic Republic of the] Congo, Kundelungu [-10.25, 27.60], leg. Mme Tinaut [RMCA].

Diagnosis.

Length 2.2-2.6 mm, 1.9-2.0 × as long as wide, colour brown, shiny; antennal club with two clearly-visible procurved sutures, a third and fainter suture near the margin; frons with scant fine setae, vertex in males with pars stridens; anterior margin of pronotum with two raised teeth; elytral interstriae 9 curves before apex and continues to elytral suture, in dorsal view apical margin of elytra extending beyond margin of interstriae 9, finely serrated; scutellar shield impressed in middle, bilobed; elytral suture with bulgy locking mechanism.

Distribution.

Democratic Republic of the Congo.

Comments.

Only known from the type. It is not unlikely that X. subcostatus is the same species. However, the type differs by having a longer flange at the elytral apex, in dorsal view extending beyond interstriae 9. It also has coarser punctures along the wall of the interstrial carinae.

Species with four-spined pronotum

Figures

Figures 34 - 42. Dorsal, lateral and front view of X. bimarginatus (34, 37, 40); X. maculatus (35, 38, 41); X. genieri, holotype (36, 39, 42).