Chlorostroma subcubisporum gen. et sp. nov. and notes on the systematic position of Thuemenella cubispora

Miller A. N., L. N. Vasilyeva & J. D. Rogers (2007) Chlorostroma subcubisporum gen. et. sp. nov. and notes on the systematic position of Thuemenella cubispora.

Sydowia 59 (1): 138 - 147.

Chlorostroma subcubisporum is a new genus and species erected to accommodate a taxon featuring a green stroma bearing perithecia, asci with an apex that does not become blue in iodine, and subcubical brown ascospores with a prominent germination slit. The two extant collections are inhabitants of Hypoxylon stromata from North Carolina. Although this taxon seems to be a member of family Xylariaceae (Xylariales, Ascomycota), its position is equivocal owing to anomalies in cultures and molecular data. Thuemenella cubispora , which C. subcubisporum resembles in general ascus and ascospore morphology, was tentatively considered by others to be a member of family Xylariaceae primarily on the basis of its Nodulisporium - like anamorph. Molecular data presented herein supports this taxonomic disposition.

Keywords: ascomycetes, pyrenomycetes, Great Smoky Mountains National Park, LSU.