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All Fungi
Trichonectria sp. P2162
Nomenclature
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Family: BionectriaceaeGenus: Trichonectria
SUMMARY
Anamorph: a single Fusarium-like conidium was seen approximately 90 µm long (measured in a straight line from end to end) and 8 µm diam., falcate with the apex distinctly curved and a small basal "knee" ca 5 µm from the narrow truncate base, very pale yellow, 9-septate, the cells rather variable in length. The connection to the teleomorph has not been established.
Teleomorph: stromata absent. Ascomata perithecia, 220-280 µm diam. and 150-220 µm tall, superficial, without a basal stroma and with vegetative hyphae poorly developed, subglobose, the ostiolar region not or hardly papillate. Peridium orange, not changing colour in KOH or lactic acid, covered (except at the base) with hyaline thick-walled glassy hairs 55-90 x 5-7 µm, mostly 4- to 5-septate, the basal cell sometimes somewhat inflated, the apex obtuse; composed of an outer layer of thin-walled globose to angular cells 15-23 µm diam. and an inner layer of hyaline flattened tissue. Interascal tissue not seen, periphyses well-developed, 25-30 µm in length. Asci 95-120 x 18-22 µm, clavate, rather short-stalked, thin-walled, the apex obtuse to rounded, apical ring not seen, 8-spored. Ascospores arranged biseriately, (21-) 24-27 (-29.5) x 9-11 µm, rather variable in shape but usually ellipsoidal to fusiform-ellipsoidal, strongly constricted at the median to submedian septum, the upper cell usually slightly wider than the lower cell, the apex usually obtuse and the base acute to obtuse, thin- and smooth-walled, pale yellow, without a gelatinous sheath or appendages.