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Keissleriella pinicola
Nomenclature
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Family: LentitheciaceaeGenus: Keissleriella
SUMMARY
Anamorph: not known.
Teleomorph: ascostromata perithecial, 90-140 µm diam. and 100-150 µm tall, globose to pyriform, at first immersed and soon becoming superficial, in small clusters or scattered over the substratum surface, black, the ostiole strongly papillate and surrounded by dark brown acute-ended setae 15-20 µm in length and ca 2 µm diam. Peridium 12-20 µm thick, composed of 2-5 layers of dark brown thick-walled angular cells to 4·5 µm diam. Interascal tissue of filiform pseudoparaphyses filiform, degenerating by the time the asci are mature. Asci 45-65 x 7.5-11 µm [50-70 x 9-13 µm fide Hawksworth & Sivanesan 1975], clavate-cylindrical, short-stalked, thick-walled and fissitunicate with an inconspicuous ocular chamber, 8-spored. Ascospores arranged biseriately, 11.5-14 x 3.5-4.5 µm [14-19 x 3.5-4.5 µm fide Hawksworth & Sivanesan 1975], broadly fusiform, straight or slightly curved, 3-septate, slightly constricted at the mid septum, with rounded apices, initially hyaline but becoming pale brown at maturity, without a gelatinous sheath or appendages.