The species was described as Agaricus fenzlii Schulzer (Schulzer et al. 1866). First detailed revision was published by Singer (1979) under name Chamaeota fenzlii (Schulzer) Singer.
Pluteus fenzlii (Schulzer) Corriol & P.-A. Moreau, Persoonia 19(2): 248 (2007) – Figs. 1-10
= Agaricus fenzlii Schulzer, in Schulzer, Kanitz & Knapp, Verh. zool.-bot. Ges. Wien 16(Abh.): 49 (1866).
= Annularia fenzlii (Schulzer) Schulzer, in Kalchbrenner, Icon. Sel. Hymenomyc. Hung. (Budapest): tab. 10, fig. 1 (1874).
= Chamaeota fenzlii (Schulzer) Singer, Sydowia 31(1-6): 198 (1979).
= Pluteus fenzlii (Schulzer) E.F. Malysheva, O.V. Morozova & Zvyagina, Acta Mycologica, Warszawa 42(2): 155 (2007), superfluous combination (see Borovička 2008) published 23 days after the same act was carried out by Corriol & P.-A. Moreau (2007).
There is a very similar species in North America, Pluteus mammillatus (Longyear) Minnis, Sundb. & Methven (Minnis et al. 2006), originally described as Annularia mammillata Longyear (Longyear 1902), which differs from P. fenzlii only by white to greyish-red lamellar edge (yellow in P. fenzlii).
Pluteus fenzlii is a very rare fungus known only from several countries in Europe and Asia.
Grows in the forest-steppe and taiga zone, and taiga belt, in humid and swamped birch, and mixed forests, on birch windfall.
In Slovakia the species usually occurs in hilly areas with more or less natural broadleaved habitats, mostly thermophilic ones. Based on data from Poland, Slovakia and Hungary, the most frequent substrate in this part of Europe is Quercus cerris (5 localities), followed by Fagus sylvatica (2). Basidiomata were observed on fallen trunks (including their branches), both thin and medium thick (10-55 cm diam.), and branches separated from old living trees and lying on soil (about 20 cm diam.). The basidiomata grew either from decorticated wood or cracks in the bark, often at sites covered by mosses.
Holec J., Kunca V., Ševčíková H., Dima B., Kříž M., Kučera T. (2018): Pluteus fenzlii (Agaricales, Pluteaceae) – taxonomy, ecology and distribution of a rare and iconic species. Sydowia 70: 11-26.
Corriol G., Moreau P.-A. (2007): Agaricus (Annularia) fenzlii redécouvert dans les Pyrénées. Notes sur le genre Chamaeota en Europe. Persoonia 19: 233-250.
Malysheva E. F., Malysheva V. F., Justo A. (2016): Observations on Pluteus (Pluteaceae) diversity in South Siberia, Russia: morphological and molecular data. Mycological Progress 15: 861-882.
Vizzini A., Ercole E. (2011): A new annulate Pluteus variety from Italy. Mycologia 103: 904-911.