Crypturgus


Type species

Bostrichus pusillus Gyllenhal

Adapted from Wood 1982, p. 740-743


Diagnosis

Crypturgus can be distinguished from Dolurgus Eichhoff by their smaller size, the 2-segmented antennal funicle which often appears as being only one, the club with a partial septum in place of the first suture, and an indistinct suture near the apex.


Description

Species in this genus range from 1.0 to 1.2 mm in length and are approximately 2.8 times as long as wide. Their color varies from dark brown to black. The pronotum is longer than wide. The scutellum is small. The declivity is convex and has a vestiture of recumbent long bristles, the same as in the rest of the body; the females of two native species have a spongy area at the apex. The anterior margin of the compound eye is emarginate. The scape is longer than the 2-segmented funicle, which often looks like a single segment. The club is asymmetrical and club-shaped (rhomboid) with only an indistinct procurved suture at its apex. The procoxae are contiguous.


Distribution

Canada and the United States, Europe, northern Asia, and North Africa


World fauna

Number of species: 17, Native species: 3, Introduced species: 1


Established exotic species

Crypturgus pusillus is present in Maine, New Hampshire, Massachusetts, Connecticut, Rhode Island, New York, New Jersey, and Pennsylvania.


Hosts

Abies, Cedrus, Larix, Picea, Pinus