Non- or doubtfully lichenised. Poorly known taxon.
Substrate: lignum
Altitudinal distribution: subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a probably non-lichenised species, apparently closely related to P. anodonta, the perithecioid ascomata (c. 0.3 mm in diam.) with a greenish-black ascomatal wall, the interascal filaments distinct and numerous, with a hemiamyloid hymenial gel, ascospores hyaline, ellipsoid-oblong (17-18 × 4-7 µm), with 3-5 transversal septa and 1 incomplete longitudinal septum; lignicolous on decorticated, dead branches of Rhododendron ferrugineum; only known from the Eastern Alps (Austria).
