Protothelenella xylina H. Mayrhofer & Poelt
Lichenised.
Substrate: lignum
Altitudinal distribution: subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a species resembling P. sphinctrinoidella but with an inconspicuous endoxylic thallus, and broader ascospores (to c. 15 µm wide), often with 2 incomplete longitudinal septa; on wood of coniferous trees (Pinus cembra); rare in Central Europe, with a few records from the Alps (Switzerland, Austria).
Austria: Tirol; Steiermark; Switzerland: Graubünden;