Gnomonia leptostyla

Gnomonia leptostyla is a fungal plant pathogen. It is newly named Ophiognomonia leptostyla and occurs on walnut (Juglans spp.) and causes leaf blotch and leaf spots which is called walnut anthracnose or walnut black spot. The anamorph is Marssoniella juglandis.^[1]

Gnomonia leptostyla
Topside view of a Juglans regia leaf infected by G. leptostyla
Underside view of a Juglans regia leaf infected by G. leptostyla
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Sordariomycetes
Order:	Diaporthales
Family:	Gnomoniaceae
Genus:	Gnomonia
Species:	G. leptostyla
Binomial name
Gnomonia leptostyla (Fr.) Ces. & De Not., (1863)
Synonyms
Gloeosporium juglandis (Lib.) Mont., (1849) Gnomonia juglandis (DC.) Traverso Leptothyrium juglandis Lib.,: no. 164 (1832) Marssonia juglandis (Lib.) Sacc., (1884) Marssoniella juglandis (Lib.) Höhn., (1916) Marssonina juglandis (Lib.) Magnus, (1906) Neomarssoniella juglandis (Lib.) U. Braun, (1991) Sphaeria juglandis DC., (1815) Sphaeria leptostyla Fr., (1823)