Xyloctonus quadridens Schedl, 1953

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 quadridens Schedl, 1953

Figs 50 , 52 , 54

Xyloctonus quadridens Schedl, 1953: 77.

Type material.

Syntypes: Madagascar, Mt. D’Ambre, 1930, Sicard leg. [MNHN].

Diagnosis.

Length 1.9-2.2 mm, 1.8-1.9 × as long as wide, colour black, dull; antennal club with two visible procurved sutures, a third suture intergrades with the apical margin of club; anterior margin of pronotum with four raised teeth; elytral interstriae 9 curves before apex and continues to elytral suture; scutellar shield rugose, slightly impressed in middle; elytral suture straight; male profemur with tiny spine on its ventral side.

Distribution.

Madagascar.

New records.

Madagascar, Andasibe, Mantadia National Park [-18.861, 48.447], 900 m alt. 15 and 16 May 2015, ex Labramia bojeri log, B. Jordal, leg. [ZMUB]; Reserve speciale de l’Ankarana, 22.9 km SW Anivorano, B. Fischer [CAS].

Biology.

The collection from Labramia bojeri ( Sapotaceae ) is the first known host for this species. Egg tunnels were cut transversely to the grain. Broods were old and only fully sclerotised adults were found. Counts of larval mines ranged between 30 and 50 (n = 4).

Comments.

According to Menier (1974), the male should have a pars stridens on its vertex. However, none of the males at hand had this feature, despite the unique presence of a femoral spine (n = 4).

Figures

Figures 50 - 55. Dorsal, lateral and front view of male X. quadridens (50, 52, 54); X. magnus, holotype (51, 53, 55).