Diplotrichus gracilis ( Schedl, 1958 )

Jordal, Bjarte H., 2021, An integrated taxonomic revision of Diplotrichus (Coleoptera, Scolytinae) supports a Malagasy origin and single colonisation of South Africa, Zootaxa 5047 (2), pp. 101-122 : 106

Diplotrichus gracilis ( Schedl, 1958)

( Figs 1, 4 , 8, 10, 12, 13 )

Lanurgus gracilis Schedl, 1958: 559 , orig. spelling

Type material. Holotype: South Africa, Zululand , Eshowe [ NHMUK].

Diagnosis. Elongated species, 1.6–2.0 mm long, 2.7–2.9 × as long as wide; colour dark brown or black; female frons flattened to very lightly concave, surface covered by densely placed, soft setae as long as the funiculus; scapus triangular, with a broad split tuft of setae as long as those in frons; antennal club with two clearly marked procurved sutures; seta on elytral interstria spatulate, densely placed in regular rows except interstriae 1, separated within rows by half the length of a seta.

Distribution. South Africa.

New records: South Africa, East Cape province, Alexandria Forest, GIS -33.70, 26.35; West Cape, 5 km N Hoekwil, Woodville , GIS: -33.933, 22.639 ; Knysna, Diepwalle , GIS: -33.957, 23.152 ; Knysna, Goudveld, Krisjan Se-Nek , GIS: -33.913, 22.948 [ ZMUB, SAMC] .

Remarks. All new collections were made from dead, hanging lianas, in forests around Knysna. Only male-female pairs were observed, and the male tend to leave the gallery at early larval stage.

Figures

FIGURES 1–6. Proventriculus (1–3) and male genitalia (4–6) of Diplotrichus gracilis (1, 4), Diplotrichus falcatus sp. nov. (2, 5), and Diplotrichus acutior sp. nov. (3, 6).

FIGURES 8–14. Dorsal, lateral, and front view of Diplotrichus gracilis female (8, 10, 12) and male (13), and Diplotrichus widdringtoniae paratype (9, 11, 14).