Submitted to: Inoculum
Publication Type: Abstract Only
Publication Acceptance Date: 5/15/2004
Publication Date: 6/30/2004
Citation: Sogonov, M.V., Castlebury, L.A., Farr, D.F., White, J.F. 2004. The taxonomy of the genus gnomonia: distinction between g. gnomon and g. setacea. Inoculum. v. 55 (4) p. 35.
Technical Abstract: Species of the diaporthalean genus Gnomonia are common though poorly known microfungi occurring mostly on overwintered leaves of trees and shrubs in the temperate zone of Northern hemisphere. There has been some confusion in the literature concerning the type species of Gnomonia, since a type was not designated by the authors of the genus. Three specific names have been mentioned in literature as the type species: G. gnomon, G. vulgaris and G. setacea. Von Hoehnel designated G. gnomon as the lectotype species; however some authors have considered all to be synonyms. Our nomenclatural investigation based on literature and herbarium material has determined that G. vulgaris is a synonym of G. gnomon. The epithet 'gnomon' has priority over 'vulgaris' since the former is older. On the basis of descriptions previously published by other authors as well as our own observations of type specimens and fresh material of G. gnomon and G. setacea, we conclude that these two are distinct. These two species can be distinguished by position of the perithecium in the leaf tissue and ascospore morphology. These observations are also supported by LSU sequence analysis.