Chaetophloeus


Type species

Chaetophloeus hystrix LeConte

Adapted from Wood 1982, p. 348-363


Diagnosis

Chaetophloeus are similar to Liparthrum Wollaston but are distinct in having a 5-segmented funicle and also by the elevated crenulations on the anterior margin of the elytra, which are higher near the sutural area, and by the groups of asperities in the anterolateral area of the pronotum.


Description

Species in this genus range from 1.1 to 2.5 mm in length and are approximately 1.4 to 2.1 times as long as wide. Their color ranges from brown to black. The pronotum is wider than long and armed by two or three paired clusters of asperities in the anterolateral area of the disc. The scutellum is not visible. The elytral bases are armed from the suture to striae 4 by elevated crenulations. The declivity is usually convex with one North American species having it sulcate (concave); unarmed except in C. hystrix which has tubercles. The vestiture consists of scale-like setae, often in patterns of dark and light colors, but not as contrasting as in Hylesinus Fabricius or Pseudohylesinus Hopkins. The frons is sexually dimorphic, with a conspicuous epistomal brush. The anterior margin of the compound eye is sinuate to emarginate. The scape is shorter than the 5-segmented funicle. The club is oval and is usually marked by three straight-transverse sutures, rarely slightly procurved. The procoxae are contiguous.


Distribution

Canada to Brazil


World fauna

Number of species: 24, Native species: 9, Introduced species: 0


Hosts

Acras, Amelanchier, Cercidium, Cercocarpus, Cowania, Encelia, Eysenhardtia, Peraphyllum, Phoradendron, Prunus, Pyrus, Ribes, Rhus, Struthanthus