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Didymascella Thujina
''Didymascella thujina'' is an ascomycete fungus in the family Helotiaceae. ''D. thujina'' causes cedar leaf blight (also known as Keithia blight or Keithia leaf blight), a leaf disease, on western red cedar (''Thuja plicata'') and white cedar (''T. occidentalis''). Taxonomy and nomenclature The common name of Keithia blight or Keithia leaf blight was derived from the first generic designation for the fungus and remained in use for many years. Pier Andrea Saccardo erected the genus ''Keithia'' in 1892 for this fungus, and in 1903 the genus ''Didymascella'' for the same fungus was published as new, twice in the same month. René Maire in 1905 rejected the generic designation of ''Didymascella'' when he followed a suggestion that it was synonymous with ''Keithia''. In 1927, Maire again took-up the genus ''Didymascella'' when it was reported that ''Keithia'' was previously used for a genus of flowering plants. The name ''Keithia thujina'' remained in use in the literature u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascomycete
Ascomycota is a phylum of the kingdom Fungi that, together with the Basidiomycota, forms the subkingdom Dikarya. Its members are commonly known as the sac fungi or ascomycetes. It is the largest phylum of Fungi, with over 64,000 species. The defining feature of this fungal group is the " ascus" (), a microscopic sexual structure in which nonmotile spores, called ascospores, are formed. However, some species of the Ascomycota are asexual, meaning that they do not have a sexual cycle and thus do not form asci or ascospores. Familiar examples of sac fungi include morels, truffles, brewers' and bakers' yeast, dead man's fingers, and cup fungi. The fungal symbionts in the majority of lichens (loosely termed "ascolichens") such as ''Cladonia'' belong to the Ascomycota. Ascomycota is a monophyletic group (it contains all descendants of one common ancestor). Previously placed in the Deuteromycota along with asexual species from other fungal taxa, asexual (or anamorphic) ascomycetes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
