Dryocoetes


Type species

Bostrichus autographus Ratzeburg

Adapted from Wood 1982, p. 723-731


Diagnosis

Species in the genus Dryocoetes can be recognized from the similar Coccotrypes Eichhoff by their broad oral region and their rugulose and never convergently aciculate frons. They can also be differentiated by their hosts and their more northern distribution (with the exception of D. betulae which occurs in Florida).


Description

Species in this genus range from 1.7 to 4.4 mm in length and are approximately 2.3 to 2.6 times as long as wide. Their color is a dark reddish brown. The pronotum is usually longer than wide, with the anterior area asperate. The scutellum is small. The declivity ranges from convex to flat and has granules. The vestiture consists of long and erect hair-like setae. The frons vestiture consists of a dense brush of hair-like setae in females of some species and its surface is rugulose. The oral region is particularly broad. The anterior margin of the compound eye is emarginate. The scape is longer than the 5-segmented funicle. The club is obliquely truncate with one to two recurved sutures on the posterior face. The procoxae are contiguous.


Distribution

North America, Asia, Europe, and Africa


World fauna

Number of species: 42, Native species: 7, Introduced species: 0


Hosts

Abies, Betula, Fagus, Liquidambar, Picea, Pinus, Pseudotsuga, Tsuga