Orthotomicus


Type species

Bostrichus laricis Fabricius

Adapted from Wood 1982, p. 662-663


Diagnosis

Orthotomicus can be distinguished from similar spine-bearing genera in having the third and lowest pair of spines displaced toward the elytral suture and away from the margin. The declivital margin is elevated in a distinct ridge, unlike in Pityokteines Fuchs.


Description

Species in this genus range from 2.4 to 3.3 mm in length and are approximately 2.5 times as long as wide. The color is dark reddish brown. The pronotum is usually longer than wide. The scutellum is large and flush with elytra. The declivity is concave, with three pairs of spines in the margins; the lowest is displaced towards the suture. The vestiture consists of usually long and erect hair-like setae. The anterior margin of the compound eye is emarginate to sinuate. The scape is usually longer than its 5-segmented funicle. The club is obliquely truncate with two recurved sutures, though sinuate in latidens and spinifer. The procoxae are contiguous.


Distribution

Coniferous forests of northern North America, Europe, and Asia


World fauna

Number of species: 13, Native species: 3, Introduced species: 1


Established exotic species

Orthotomicus erosus is present in California.


Hosts

Pinus, Picea, Larix