A revision of Corniculariella

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Abstract
A history of the names Corniculariella and Cornularia is presented. Cornularia is rejected as superfluous. Emended descriptions of Corniculariella, and C. abietis, its type species, are provided. A key is given for seven form-species: C. abietis, C. harpographoidea sp. nov., C. hystricina comb. nov., C. populi sp. nov., C. pseudotsugae comb. nov., C. spina comb. nov., and C. urceola comb. nov.Cornularia viburni is considered a nomen dubium, C. sphaeroidea is considered to belong in Heteropatella, and C. macrospora is considered to belong in Subulariella. A brief history of C. microscopica is presented. Some names in Cornularia led to revisions of other genera. Micropera was found to be a later homonym, and Foveostroma, nomen novum, is proposed to accommodate M. drupacearum, the type species, and also M. abietina. Emended descriptions for Gelatinosporium and G. betulinum, its type species, are presented.In the table, the transfers of form-species of Corniculariella can be followed by tracing the symbol representing each form-species. All illustrations are of type material.