Taxonomic history

Phloeosinus major Stebbing, 1909: 19.

Xyleborus major (Stebbing): Stebbing, 1914: 590.

Notoxyleborus major (Stebbing): Maiti and Saha, 1986: 100.

Fortiborus major (Stebbing): Hulcr and Cognato, 2010a: 17.


Xyleborus siclus Schedl, 1936d: 26Hulcr and Cognato, 2010a: 18.


5.2−6.0 mm long (mean = 5.58 mm; n = 5); 2.52−2.71 times as long as wide. This species can be distinguished by the moderate size; conspicuously angulate elytral apex; posterolateral declivital costa conspicuously elevated and asperate, making the declivity appear very broad and flat; declivital interstrial granules uniformly sized, present from base to apex; and discal interstrial punctures confused.

May be confused with

Fortiborus macropterus


‘Borneo’, India (Andaman Is, Assam, West Bengal), Indonesia (Mentawei Is., Sumatra), New Guinea, Thailand

Host plants

This species is also closely associated with Dipterocarpaceae (Browne 1961b). There are records of single specimens taken from three other families (Ohno 1990), but they may not have been breeding.

DNA data

specimens not available for sequencing