Cactopinus


Type species

Cactopinus hubbardi Schwarz

Adapted from Wood 1982, p. 637-648


Diagnosis

This genus is easily distinguished by the pair of epistomal male horns and the distinctive pronotal and elytral elevated sculpture which is unique in the Scolytini. These are extremely rare species occurring in arid areas in southwestern United States.


Description

Species in this genus range from 1.2 to 2.3 mm in length and are approximately 2.0 to 2.6 times as long as wide. Their color varies from dark brown to black. The pronotum has the summit behind the middle and is anteriorly armed by asperities. The scutellum is small and depressed. The declivity is usually bisulcate. The vestiture consists of hair-like setae. Their frons is sexually dimorphic; female frons is unarmed, convex to slightly concave, with a sparse vestiture and an epistomal brush. The anterior margin of the compound eye is entire to sinuate. The scape has long setae and the funicle is 5-segmented. The club is usually oval but is circular in a few species and is densily covered by recumbent, short setae; it has two straight to procurved sutures. The procoxae are contiguous.


Distribution

Southwestern U.S. to Oaxaca, Mexico


World fauna

Number of species: 18, Native species: 5, Introduced species: 0


Hosts

Number of species: 18, Native species: 5, Introduced species: 0