Fortiborus Hulcr & Cognato, 2010

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

Fortiborus Hulcr & Cognato, 2010

Fortiborus Hulcr & Cognato, 2010a: 17.

Type species.

Phloeosinus major Stebbing, 1909; original designation.

Diagnosis.

Fortiborus species are among the largest xyleborines in Southeast Asia (4.8-6.6 mm and 2.52-3.06 × as long as wide). Fortiborus is distinguished by the robust pronotum; declivity flattened and broadened laterally, apex angulate; anterior edge of pronotum extended anteriad, bearing a distinct row of serrations; antennal club distinctly pubescent, type 4; eyes very large, deeply emarginate; scutellum flat, flush with elytra; procoxae contiguous; and mycangial tufts absent.

Fortiborus is similar to some large Euwallacea species except the margin of segment 1 of antennal club is concave and recurved; anterior edge of pronotum produced anteriad, bearing row of serrations; and protibiae rounded, with seven or more denticles.

Similar genera.

Euwallacea , Xyleborus .

Distribution.

Found throughout Southeast Asia and Oceania.

Gallery system.

The galleries are regularly branched in one transverse plane and are without brood chambers ( Browne 1961b).

Remarks.

The species of this genus are all closely associated with Dipterocarpaceae and are not definitely known to breed in other families of trees.