Cyclorhipidion impar (Eggers, 1927) Smith & Beaver & Sittichaya, 2022

Smith, Sarah M., Beaver, Roger A. & Sittichaya, Wisut, 2022, One hundred eighteen taxonomic changes among Xyleborine ambrosia beetles (Coleoptera: Curculionidae: Scolytinae), Zootaxa 5194 (2), pp. 151-175 : 157-158

Cyclorhipidion impar (Eggers, 1927) comb. nov.

Xyleborus impar Eggers, 1927b: 89 .

Remarks. The males of most xyleborines are much smaller than the females, weakly sclerotized, with reduced eyes and non-functional hind wings. However, in a few genera, e.g. Cyclorhipidion , this is not the case. The males of Cyclorhipidion can be recognised by their relatively large size, well-sclerotized body, and characteristic habitus. The head is large, semiprognathous, the mandibles large and powerful, but the eyes and antennae reduced in size relative to the female. The pronotum is elongate, usually as long as or longer than the elytra, widest in the anterior quarter, the sides straight or slightly emarginate, the posterior angles rounded, convex dorsally without an impression anteriorly, nor a median projection of the anterior margin. The elytra are relatively short, rounded posteriorly, the declivity convex without distinct sculpture. The protibiae are curved with a row of strong, socketed teeth on the outer margin extending almost to the base. The description of Xyleborus impar indicates that it clearly possesses the characteristics of Cyclorhipidion males, and the species is here transferred to that genus. The female of C. impar is likely to have been described under a different name. However, males of the great majority of species of Cyclorhipidion are still unknown, and male and female need to be collected in association for a definite association to be made.

Distribution. Philippines.