Taxonomic history

Xyleborus cognatus Blandford, 1896a: 19.


2.8−3.1 mm long (mean = 2.96 mm; n = 5); 2.8−3.1 times as long as wide. This species is distinguished by the protibia obliquely triangular, broadest at distal third; elytral declivity smooth, shining (specimen must be dry); large size; declivital interstriae 1, 3 armed with 2−3 pairs of large tubercles; interstriae 2 sparsely granulate at declivital summit; elytra darker on declivity than disc.

This species is very similar to X. perforans with which it has often been treated as a synonym. It can be distinguished by the larger size, generally more slender form (vs 2.67–2.89 times as long as wide), larger interstrial tubercles and typically a bicolored elytra.

May be confused with

Xyleborus affinis, X. ferrugineus, X. festivus, X. perforans, X. pfeilii, and X. volvulus


Australia, India (Andaman Is, Bihar, Uttarakhand, West Bengal), Indonesia (Java, Kalimantan, Sulawesi, Maluku, Sumatra, Sumbawa), East & West Malaysia, Myanmar, New Caledonia, New Guinea, Philippines, Singapore, Solomon Is., Sri Lanka, Thailand, Vietnam

Host plants

polyphagous (Beeson 1930, Browne 1961b, Ohno 1990)


The species is frequently associated with mangrove forests, but also attacks a very wide variety of other trees (Browne 1961b, Maiti and Saha 2004).

DNA data

specimens not available for sequencing