• Proposed
  • Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Resinoporia piceata (K. Runnel, Spirin & Vlasák) Audet

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Scientific name
Resinoporia piceata
(K. Runnel, Spirin & Vlasák) Audet
Common names
amylopórovka aljašská
pórnatka sitková
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Under Assessment
Proposed by
Vladimír Kunca
Vladimír Kunca
Comments etc.
Anders Dahlberg

Assessment Notes

Questions of e.g. occurences, ecology and status can be posted here

Taxonomic notes

Basionym: Antrodia piceata K. Runnel, V. Spirin & J. Vlasák, in Spirin, Runnel, Vlasák, Miettinen & Põldmaa, Fungal Biology 119: 1303 (2015).

The species was previously considered conspecific
with Amyloporia (Antrodia) sitchensis. The distinction of the species from morphologically similar species relies mainly on the DNA characters and distribution ranges.

Why suggested for a Global Red List Assessment?

Resinoporia piceata is wood-decaying fungus with resupinate annual to perennial fruitbodies. Most records of Resinoporia piceata are from old-growth forests, where it inhabits large lying trunks of conifer trees, mostly Picea spp. It is an Eurasian species with very rare occurrence throughout its distribution range.

Geographic range

Resinoporia piceata occurs in Eurasia, in boreal and temperate zone, but it is very rare throughout its distribution range (Spirin et al. 2015, Holec et al. 2015).

Population and Trends

It is proposed to be old-forest indicator (Runnel & Lõhmus, 2017; Lõhmus et al. 2018). Most of localities of the fungus are old-growth forests (Spirin et al. 2015). In Slovakia, there are two localities which belong among the most valuable old-growth forests here. The same we can say for one in the Czech Republic and for two localities in Poland. There are 8 confirmed records in Finland (Kunttu et al. 2016) and ca. 20 records from old-growth forests in Estonia (Runnel & Lõhmus, 2017). In Norway, 11 localities of the species are known (Rolstad & Storaunet 2015).

Population Trend:

Habitat and Ecology

It inhabits large lying trunks of conifer trees, in decay stages from 2 to 4 - from slightly to strongly decayed (Niemelä et al. 1992, Kunttu et al. 2014, Holec et al. 2015, Kunttu et al. 2016), particularly in natural and untouched forests. It is sometimes also reported from stumps and dead standing trees. It grows almost exclusively on Picea (Spirin et al. 2015), but sporadically was collected from Abies alba (Vampola & Pouzar 1992, Vlasák J. 2007, unpublished from Slovakia) and Pinus sylvestris (Niemelä et al. 1992); once from Populus (Karasiński & Wołkowycki, 2015). In China, it is recorded besides Picea and Pinus also from Larix and Cunninghamia (Dai 2012). It sporulates in summer.


Habitat of the fungus decline due to clearcutting, intensive forest practices (e.g. processing spruce trees attacked ba bark beetle) and removing logs of Picea sp. after wind storms or pest outbreaks (salvage cuttings) also from protected areas. In the well known Bialowieza forest, the threat is due to cutting in the area, especially spruce trees. Another threat, not only here, is also natural decreasing of Picea abies population due to changing climate conditions (global warming). Similar long-term problem is known with regeneration and surviving of Abies alba in Europe.

Conservation Actions

The occurrence of Resinoporia piceata is mostly restricted to old-growth forests. Localities with occurrence of the species should be strictly protected, at the highest conservation level - no management practices. Newly discovered localities should be saved by declaring them protected areas. The fungus needs coarse woody debris, especially large logs of conifers in different stages of decay.

Research needed

More intensive research of some localities which have never been mycologically studied. Some old-growth forests in Slovakia and Ukraine are still very little surveyed or not at all. Some fruitbodies of the species can be overlooked because they occurs hidden at the bottom parts of logs.

Use and Trade

Fruitbodies of the fungus are not known to be used or collected.


Dai Y.C. 2011. Polypore diversity in China with an annotated checklist of Chinese polypores. Mycoscience 53: 49–80.

Holec J., Kříž M., Pouzar Z., Šandová M. 2015. Boubínský prales virgin forest, a Central European refugium of boreal-montane and old-growth forest fungi. Czech Mycol. 67(2): 157–226.

Karasiński D. & Wołkowycki M. 2015. An annotated and illustrated catalogue of polypores (Agaricomycetes) of the Białowieża Forest (NE Poland). Pol Bot J. 60(2): 217–292. http://dx.doi.org/10.1515/pbj-2015-0034

Kunttu P., Pennanen J., Kekki T., Kulju M., Suominen M. 2014. Noteworthy records of aphyllophoroid fungi in Finland (Basidiomycota). Acta Mycologica 49: 221–235.

Kunttu P., Kulju M., Kekki T., Pennanen J., Savola K., Helo T., Kotiranta H. 2016. Extensions of known geographic distribution of aphyllophoroid fungi (Basidiomycota) in Finland. Mycosphere 7: 333–357.

Lõhmus A., Vunk E., Runnel K. 2018. Conservation management for forest fungi in Estonia: the case of polypores. Folia Cryptogamica Estonica 55: 79−89.

Niemelä T., Kotiranta H., Pentillä R. 1992. New records of rare and threatened polypores in Finland. Karstenia 32: 81−94.

Rolstad, J. & Storaunet, K. O. 2015. Vedlevende rødliste-sopper og norsk skogbruk - en kritisk gjen-nomgang av Norsk rødliste for arter 2010. Oppdragsrapport 05/2015, Norsk institutt for skog og landskap. [in Norwegian]

Runnel K. & Lõhmus A. 2017. Deadwood-rich managed forests provide insights into the old-forest association of wood-inhabiting fungi. Fungal Ecology 27: 155−167. http://dx.doi.org/10.1016/j.funeco.2016.09.006

Ryvarden, L. & Melo, I. 2014. Poroid fungi of Europe. Synopsis Fungorum 31: 1–455.

Spirin V., Runnel K., Vlasák J., Miettinen O., Põldmaa K. 2015. Species diversity in the Antrodia crassa group (Polyporales, Basidiomycota). Fungal Biol 119: 1291–1310. https://doi.org/10.1016/j.funbio.2015.09.008

Stokland, J.N. & Larsson K. 2011. Legacies from natural forest dynamics: different effects of forest management on wood-inhabiting fungi in pine and spruce forests. Forest Ecology and Management 261(11): 1707–1721.

Vampola P. & Pouzar Z. 1992. Contribution to the knowledge of a rare resupinate polypore Amyloporia sitchensis. Česka Mykol. 46(3–4): 213–222.

Vlasák J. 2007. Poznámky k ekologii vzácného choroše pórnatky nahořklé (Amyloporia sitchensis) [Comments on the ecology of the rare resupinate polypore Amyloporia sitchensis]. Mykologické listy 99: 4–7. [in Czech with English summary]

Known distribution - countries

Regional Population and Trends

Country Trend Redlisted