Leptographium engelmannii, a synonym ofLeptographium abietinum, and description ofLeptographium hughesiisp.nov.

摘要

Leptographium abietinumoccurs in North America on various members of the Pinaceae, especially spruce (Piceaspp.), usually in association with bark beetles (Coleoptera: Scolytidae). It is characterized by noticeably curved, clavate conidia. All the isolates were from species of Pinaceae in North America except two isolates examined by Kendrick, originating fromParashorea plicataimported to England from Borneo and fromMeliasp. imported into New Orleans, U.S.A. After examination of the isolate from Borneo and a similar isolate from Vietnam, we have concluded that these do not representL. abietinum. They are described as a new species,Leptographium hughesii. Leptographium engelmannii, described from Engelmann spruce in Colorado, U.S.A., is indistinguishable fromL. abietinumand is considered a synonym of the latter species.Key words: Hyphomycetes,Ophiostoma, bark beetles.