Streptocranus Schedl, 1939

Smith, Sarah M., Beaver, Roger A. & Cognato, Anthony I., 2020, A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China, ZooKeys 983, pp. 1-442 : 1

Streptocranus Schedl, 1939

Streptocranus Schedl, 1939b: 52.

Type species.

Streptocranus mirabilis Schedl, 1939b; monotypy.

Diagnosis.

The most slender and extremely elongated species (1.9-4.9 mm; 3.85-4.75 × as long as wide) occurring in Southeast Asia. Streptocranus is distinguished by its unique subquadrate and laterally constricted pronotum (type a in lateral view; type c in dorsal view) with a flat and long pronotal disc; elytral apex divaricate and ornamented with a pair of distal processes; protibiae slender, sickle-shaped; mycangial tufts absent; scutellum flat, flush with elytra; and procoxae contiguous.

Similar genera.

Debus .

Distribution.

Only occurring in the Paleotropics and Oceania.

Gallery system.

The gallery systems of Streptocranus seem to be rather variable, with a few branches that may run horizontally or longitudinally, and may be irregularly widened, but without distinct brood chambers ( Browne 1961b).