Need more extensive documentaion to be assessed
Species grows on strongly decayed wood (decidous) in old growth forests, virgin forests and in forests with natural forest succession, in humid microclimate, usually in the immediate presence of a brook. Recognizable (in macro and micro): The species is quite large and recognizable asco,in macro (FB: outside is densly punctate), but also microscopically (parafyses are lanceolate, with acute apex).
Very recent study in Europe (Betak et al. 2012), has revealed that the species is very rare in Europe with 17 known localities.
Atleast 17 localities known in Europe. Of those, two localities in Finland (Muurame and Sipoo; Finland).
Population Trend: Decreasing
In old growth and herb-rich virgin forests. Forests with natural succession in the immediate presence of a brook, brook-side habitats. On strongly decayed, mossy, Fagus sylvatica, Alnus incana, Betula spp., Carpinus betulus, Populus tremula and Ulmus glabra trunks.
Logging and wood harvesting. Decrease of decayed wood in the forests.
Leaving dead wood logs to the forests.Logging/harvesting forbidden on known localities, brook-sides.
Běťák J., Pärtel K., Kříž M. (2012): Ionomidotis irregularis (Ascomycota, Helotiales)
v České republice s poznámkami k jeho rozšíření a ekologii v Evropě. – Czech
Mycol. 64(1): 79–92.
von Bonsdorff T., Kytövuori I., Vauras J., Huhtinen S., Halme P., Rämä T., Kosonen L. & Jakobsson S. 2014: Sienet ja metsien luontoarvot. — Norrlinia 27: 1–272. (Fungi of the forests with high conservation value in Finland – indicator species).