Taxonomic history

Xyleborus sexdentatus Eggers, 1940: 148.

Ambrosiodmus sexdentatus (Eggers): Wood and Bright, 1992: 680. 

Ambrosiophilus sexdentatus (Eggers): Hulcr and Cognato, 2009: 24.


2.7−3.0 mm long (mean = 2.84 mm; n = 5); 2.7−2.9 times as long as wide. This species can be distinguished by declivital interstriae 1, 2, 3 each armed by one major tubercle surrounding declivital sulcus; pronotum from dorsal view basic (type 2); pronotal declivity rounded, convex; pronotum anterior margin lacking serrations; pronotum from lateral view tall (type 2); pronotal discal punctures small, fine spaced by at least two diameters of a puncture, surface shining; elytral declivity strongly sulcate to interstriae 3, lateral margins of sulcus rounded, margin armed with three large spines, one at the base of interstriae 2, one at the declivital midpoint of interstriae 3 and one on the apical third of interstriae 3.

May be confused with

Ambrosiophilus latisulcatus and A. sulcatus


Indonesia (Java), Papua New Guinea, Thailand

Host plants

recorded from Quercus (Fagaceae) and Tectona (Lamiaceae) in Java (Kalshoven 1959b)


a mycocleptic associate of Beaverium species (Hulcr and Cognato 2010b, Hulcr and Cognato 2013)

DNA data

Sequences available for COI and CAD.

COI: HM064051.1

CAD: HM064230.1