Acanthorhynchus vaccinii  

Stroma absent. Ascomata perithecial, 200-250µm diam, immersed, epigenous, ± globose, the ostiolar region black, papillate, erumpent, periphysate, surrounded by dark brown setae to 150µm long. Peridium thin-walled, almost hyaline, composed of thin-walled textura globulosa with cells to 30µm diam. Interascal tissue composed of paraphyses to 2µm diam, thin-walled, immersed in a gelatinous matrix, evanescent at maturity. Asci 110-135 x 31-38µm, saccate, very short-stalked, thin-walled, the apex sometimes attenuated, with a small apical ring 4-5µm diam and ca 0.5µm thick, 8-spored. Ascospores (28.5-)31-39 x 12.5-15.5µm, cylindric-ellipsoidal, often slightly curved (fabiform), hyaline, aseptate, fairly thick-walled, with a complex sheath developing when completely mature to 2.5µm thick which partially appears gelatinous but contains outward-pointing fibrous structures which appear spine-like.

Anamorph: unknown.