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Polycoccum ventosicola
Nomenclature
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Family: PolycoccaceaeGenus: Polycoccum
SUMMARY
Anamorph: not known.
Teleomorph: perithecia 40–80 μm diam. [fide Zhurbenko 2007], subglobose to pyriform, ostiolate, quite deeply immersed singly or in small clusters of 2-3 beneath a common clypeus. Peridium olive-brown, turning olive in KOH, composed of angular to elongate cells to ca 8 µm diam., with rather amorphous melanization. Interascal tissue composed of branched and anastomosed rather thick-walled pseudoparaphyses 1.5-2 µm diam. Hymenial gel not blueing in iodine. Asci 70-85 x 15-17 µm, subcylindrical to elongate-clavate, short-stalked, thick-walled and fissitunicate, the apex rounded with a conspicuous broad ocular chamber, not blueing in iodine, 8-spored. Ascospores arranged obliquely uniseriately to biseriately, 13.8-15.7 x (6.2-) 6.7-7.2 µm, apparently becoming slightly broader (7.6-8.2 µm) on release from the ascus, clavate to clavate-ellipsoidal, strongly constricted at the median to slightly submedian septum, the upper cell somewhat broader than the lower, becoming dark greenish brown, thick-walled, minutely verrucose, with a broad gelatinous sheath to ca 3 µm thick on release from the ascus.
The material examined has a proportion of ascomata in small clusters beneath a common clypeus which would suggest placement in Clypeococcum, but most otherfeatures fit well with the type description and the distinction between the two genera needs further examination.