Gnathotrichus


Type species

Gnathotrichus corthyloides Eichhoff

Adapted from Wood 1982, p. 1155-1166


Diagnosis

Gnathotrichus is distinguished from other Corthylina by the convergently aciculate frons, at least below the eyes level.


Description

Species in this genus range from 2.0 to 3.7 mm in length and are approximately 2.9 to 3.3 times as long as wide. Their color ranges from light brown to almost black. The pronotum is longer than wide with its anterior half finely asperate and its anterior margin serrate. The scutellum is large and flushed with the elytra. The declivity is convex, often sulcate or bisulcate, with granules or pointed tubercles. The vestiture is rare and consists of short and light hair-like setae. The metepisternum is only visible anteriorly. The anterior margin of the compound eye is emarginate. The scape is longer than the 5-segmented funicle, which appears as 4-segmented. The club is obovate, has long setae on females, and has from zero to three procurved sutures. The procoxae are contiguous.


Distribution

North and Central America


World fauna

Number of species: 16, Native species: 7, Introduced species: 0


Hosts

Abies, Alnus, Oreopanax, Picea,Pinaceae, Pinus, Populus, Pseudotsuga, Quercus, Tsuga