Type species

Xyleborus tachygraphus Zimmermann

Adapted from Wood 1982, p. 804-809 and Rabaglia 2006


Ambrosiodmus differs from Xyleborus Eichhoff in having a completely asperate pronotum. In North American species the pronotum is usually as long as wide, whereas in Xyleborus is longer than wide.


Species in this genus range from 1.8 to 4.9 mm in length and are approximately 2.2 to 2.6 times as long as wide. Their color ranges from yellowish brown to black. As in other Xyleborina they are sexually dimorphic with smaller and flightless males. The pronotum is usually as long as wide and completely asperate. The scutellum is large and flushed with the surface of the elytra. The declivity is convex with a few species having a shallow sulcus near the suture; usually has granules with a few species having tubercles. The vestiture consists of erect hair-like setae all over and shorter, recumbent hair-like setae on the striae. The anterior margin of the compound eye is emarginate. The scape is usually as long as the 5-segmented funicle. The club is obliquely truncate with one recurved suture (two in obliquus) in its posterior face. The procoxae are contiguous.



World fauna

Number of species: 94, Native species: 5, Introduced species: 2

Established exotic species

Ambrosiodmus lewisi is present in Pennsylvania.

Ambrosiodmus rubricollis is present in Connecticut, Pennsylvania, Maryland, Delaware, Virginia, Tennessee, South Carolina, Georgia, Alabama, Mississippi, Louisiana, and Florida.


Acacia, Acer, Alnus, Carya, Castanea, Cedrela, Citrus, Coffea, Cornus, Dacryodes, Eucalyptus, Fagus, Ficus, Hevea, Juglans, Morus, Persea, Pinus, Populus, Prunus, Rhus, Quercus, Terminalia, among many others