A REVISION OF THE GENERA OF THE HYPODERMATACEAE

Abstract

A reclassification of the genera and species of the Hypodermataceae with special emphasis on the conifer-inhabiting species is presented. The 22 genera fall into 7 groups as follows. A. The Lirula complex on Abies and Picea including 3 genera: Virgella, gen. nov., with rod-shaped spores segregated from Hypoderma, Isthmiella, gen. nov., with bifusiform spores from Bifusella, and Lirula, gen. nov., with clavate spores from Hypodermella. B. The Hypodermella complex comprising Hypodermella v. Tub., subcuticular on Larix, limited to the type species; a group of 3 subepidermal genera on Pinus including Davisomycella, gen. nov., with clavate spores, Ploioderma, gen. nov., with rod-like spores, and Elytroderma Darker with 2-celled spores; and a subhypodermal genus, Lophodermella v. Höhn. on Pinus. C. The Bifusella complex with Bifusella v. Höhn. on Pinus, Duplicaria Fckl. on Empetrum, and a new subepidermal genus, Soleella, on Pinus. D. The Hypoderma complex comprising Hypoderma DC. ex Saint Amans emend. De Not., Meloderma, gen. nov., a segregate from Hypoderma having Lophodermium affinities, Lophodermium Chev., and Lophomerum Ouellette and Magasi, a recent phragmosporous segregate from Lophodermium. E. The genus Coccomyces De Not. F. The Colpoma complex with Colpoma Wallr., Xyloschizon Syd., and Bifusepta Darker. G. The Rhytisma complex with Rhytisma Fr., Placuntium v. Höhn., and Nymanomyces P. Henn.