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.