Cnestus


Type species

Cnestus magnus Sampson

Adapted from Huclr 2007, Dole 2010


Diagnosis

Cnestus can be distinguished from Xylosandrus Samson by the subcontiguous procoxae and by the more broad declivity which covers most of the elytra. The elytra are only slightly longer than the pronotum.


Description

The occurring exotic species ranges from 2.6 to 3.9 mm in length and is approximately 1.7 times as long as wide. Its color is black. The pronotum is clearly wider than long with the anterior margin armed. It presents a thick tuft of setae just anterior of the pronotum, over its mycangia. The scutellum is large, and flushed with the elytra. The declivity is unarmed and proportionally very large and convex, starting at approximately the second third of the elytra; the ventrolateral margin is raised in a line from the apex to interstriae seven. The vestiture consists of erect and hair-like setae. The anterior margin of the compound eye is emarginate. The scape is longer than the 4-segmented funicle, but it can appear as 5-segmented. The club is obliquely truncate with the basal area recurved, and the sutures are not evident. The procoxae are widely separated.


Distribution

Introduced into the southeastern to south central US


World fauna

Number of species: 22, Native species: 0, Introduced species: 1


Established exotic species

Cnestus mutilatus has been introduced to Florida, Georgia, Alabama, Mississippi, Louisiana, Arkansas, and Texas.


Hosts

Acer, Carya, Cornus, Fagus, Liriodendron, Melia, Ostrya, Pinus, Prunus, Quercus, Ulmus, Vitus