Taxonomic history

Phloeosinus minor Stebbing, 1907: 37.

Dryocoetes minor (Stebbing): Stebbing, 1914: 549.

Xyleborus minor (Stebbing): Beeson, 1930: 70.

Ambrosiodmus minor (Stebbing): Wood and Bright, 1992: 676.


Xyleborus crassus Hagedorn, 1910a: 8. Schedl, 1962a: 208.


3.5−4.0 mm long (mean = 3.74 mm; n = 5); 2.19−2.53 times as long as wide. This species can be distinguished by each declivital interstria variously tuberculate, never granulate; and red-brown color.

This species strongly resembles A. lewisi from which it can usually be distinguished by the smaller size and tubercles on interstriae 2 not distinctly larger than those of other interstriae.

May be confused with

Ambrosiodmus lewisi


Bangladesh, Bhutan, China (Chongqing, Guangxi, Jiangsu, Jiangxi, Sichuan, Yunnan, Zhejiang), India (Assam, Meghalaya, Madhya Pradesh, Maharashtra, Uttarakhand, Uttar Pradesh, West Bengal), Laos, East Malaysia, Myanmar, Nepal, Taiwan, Thailand, Vietnam. Established in the USA (Rabaglia and Okins 2011; Gomez et al. 2018a).

Host plants

polyphagous (Beeson 1930, Beeson 1961Ohno 1990Maiti and Saha 2004)


Wood and Bright (1992) considered the species as being described by Stebbing in 1909 (Stebbing, 1909: 20) and rather than in 1907 despite listing this publication under the taxonomy section for the species. This error undoubtedly occurred because Stebbing classified Phloeosinus minor as a new species in both publications. However in 1909 he states “this amplifies the description given of this insect in [1907]” at the end of the species description. This error has been unknowingly perpetuated throughout the literature published since 1992.

DNA data

Sequences available for COI and CAD.

COI: MN619826MN619827

CAD: MN620121MN620122