Ceratocystiopsis brevicomi sp. nov., a Mycangial Fungus from Dendroctonus brevicomis (Coleoptera: Scolytidae)

Abstract

Ceratocystiopsis brevicomi sp. nov. is a my- cangial fungus of the western pine beetle, Dendroc- tonus brevicomis (Coleoptera: Scolytidae). The new species is closely related to C. ranaculosus from D. frontalis and C. collifera from D. valens but can be distinguished by the size of the perithecia and asco- spores. Isozyme analysis supports the delimitation of C. brevicomi from C. ranaculosus, C. collifera and C. minuta. However, C. ranaculosus is difficult to distin- guish from C. collifera morphologically or by iso- zymes. The mating system of C. brevicomi is similar to that of C. ranaculosus, which is heterothallic, and