• Proposed
  • Under Assessment
  • VUPreliminary Assessed
  • 4Assessed
  • 5Published

Ionomidotis irregularis (Schwein.) E.J. Durand

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Scientific name
Ionomidotis irregularis
Author
(Schwein.) E.J. Durand
Common names
Peikonmalja
temravec uškatý
ušinka nepravidelná
Kurd-pigikubi
Иономидотис неправильный
Nadelbaum-Rindenbecher
Krokainā jodausene
IUCN Specialist Group
Cup-fungi, Truffles and Allies
Kingdom
Fungi
Phylum
Ascomycota
Class
Leotiomycetes
Order
Helotiales
Family
Helotiaceae
Assessment status
Preliminary Assessed
Preliminary Category
VU A2c + 3c + 4c, C2a(i)
Proposed by
Tea von Bonsdorff
Assessors
Tea von Bonsdorff
Contributors
Tsutomu Hattori, Eugene Popov, Tea von Bonsdorff
Comments etc.
A. Martyn Ainsworth, Tor Erik Brandrud, Anders Dahlberg, Inita Daniele, Daniel Dvořák, Irmgard Krisai-Greilhuber, Vladimír Kunca, Irja Saar, Else Vellinga

Assessment Notes

Justification

Ionomidotis irregularis is a temperate - boreal saprophytic ascomycete that habits trunks of a deciduous trees species eg. Alnus incana, Betula spp., Populus spp., Carpinus betulus and Fagus sylvatica. The species grows in old-growth forests, virgin forests and forests with natural forest succession. It is a rare species restricted to localities with humid microclimate with wet dead wood and with immediate presence of a brook or ravine. Known localities are very fragmented.

The species is easily identified by it´s quite large and irregular cup-like densly punctate ascocarps on dead wood. It is also easy to identify microscopically: lanceolate parafyses, with acute apex.
The species is estimated to be in decline due to intensive forest management. It is listed in red data book of Estonia as Vulnerable (VU) and in Finland as Endangered (EN).

In Europe the species is very rare in with approx. 50 (-60) known localities and an estimated total numner of localities approx 500 corresponding to about 5000 individuals. The habitat of old and virgin forests of Ionomidotis irregularis is presently facing and expected to continue to have a more than 30% decline in quality and quantity, due to intensive forestry and land-use/deforestation. The decline of the major habitat of the species, old-growth forest and virgin forests, in the evaluation period (30 years; Dahlberg and Mueller 2011) it is estimated to be in the magnitude of >30%. The decline of the species is estimated to be the same magnitude. For these reasons I. irregularis is assessed to meet the category Vulnerable (VU ) under the A-criteria (A2c+3c+4c) and the C-cruteria C2a(i)


Taxonomic notes

We treat this species here as a European taxon. There is a strong DNA-evidence that the species in Europe is different to the species in the USA (closely related species).

Irja Saar:  data from UNITE: https://unite.ut.ee/bl_forw_sh.php?sh_name=SH1610846.08FU#fndtn-panel1

https://unite.ut.ee/bl_forw_sh.php?sh_name=SH2705956.08FU#fndtn-panel1


Why suggested for a Global Red List Assessment?

A rare european species, mostly in quite rich old-growth forests and virgin forests, which are declining.


Geographic range

Ionomidotis irregularis is a temperate - boreal saprophytic ascomycete. It is known at the time from 11 European countries: Austria, Czechia, Estonia, Finland, Hungary, Norway, Poland, Russia, Slovakia, Spain and Switzerland.


Population and Trends

Ionomidotis irregularis is known from approx. 50- (60) localities in Europe from 11 countries: Estonia (22), Czechia (1), Slovakia (4), Switzerland (1), Norway (1), Finland (2), Austria (4), Hungary (1), Spain (3) and Russian Federation (approx.9) according to data from species database maps and information from mycologist of many European countries, the estimated population size is approx. 500 localities. Assuming two ocurences per sites this corresponds to approx. 5 000 individuals. The species is known from many European countries, but only very few localities in each country.

Relate decline to published data/assessments? infer the rate.

The decline of the major habitat of the species, old-growth forest and virgin forests, in the evaluation period (last 30 years) (Dahlberg and Mueller 2011) it is estimated to be in the magnitude of >30%. The decline of the species is estimated to be the same magnitude. Based on this, the species becomes red-listed as VU according to the A-criterion (A2c + 3c + 4c) (species/habitat decline >30 %) and ongoing decline together with the estimated population size of 5000 individuals also the C-criterion (C2a(i).

Population Trend: Decreasing


Habitat and Ecology

Ionomidotis irregularis is a temperate - boreal saprophytic ascomycete that habits strongly decayed mossy trunks of a deciduous trees species eg. Alnus spp. Betula spp., Ulmus glabra, Populus spp., Carpinus betulus and Fagus sylvatica. The species grows in old-growth forests, virgin forests and forests with natural forest succession. in the immediate presence of a brook, brook-side habitats.

Boreal ForestTemperate Forest

Threats

Ionomidotis irregularis and its habitats (old-growth forests/virgin forests) have been declining eg. due to intensive forestry as well as decreased habitat quality/ecological conditions (decrease of dead wood) due to modern forestry with clear-cuttings. In Finland these forests are redlisted as EN (mesic - herb-rich coniferous forests) and old mixt forets dominated with decidous trees as VU.

Add some general for the oerall dstribution

Unintentional effects: large scale (species being assessed is not the target) [harvest]

Conservation Actions

Protection of the old forests with decidous trees, leaving dead wood to the forests. Logging/harvesting forbidden near brooksides/ravins.

Land/water protectionSite/area managementHabitat & natural process restoration

Research needed

TaxonomyPopulation size, distribution & trends

Use and Trade


Bibliography

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).

Janssen, J.A.M., Rodwell, J.S., García Criado, M., Gubbay, S., Haynes, T., Nieto, A., Sanders, N., Landucci, F., Loidi, J., Ssymank, A., Tahvanainen, T., Valderrabano, M., Acosta, A., Aronsson, M., Arts, G., Attorre, F., Bergmeier, E., Bijlsma, R.-J., Bioret, F., Biţă-Nicolae, C., Biurrun, I., Calix, M., Capelo, J., Čarni, A. Poulos, P., Essl, F., Gardf, Chytrý, M., Dengler, J., Dimojell, H., Gigante, D., Giusso del Galdo, G., Hájek, M., Jansen, F., Jansen, J., Kapfer, J., Mickolajczak, A., Molina, J.A., Molnár, Z., Paternoster, D., Piernik, A., Poulin, B., Renaux, B., Schaminée, J.H.J., Šumberová, K., Toivonen, H., Tonteri, T., Tsiripidis, I., Tzonev, R. and Valachovič, M. 2016. European Red List of Habitats. Part 2. Terrestrial and freshwater habitats. European Union, Luxembourg.


Country occurrence

Regional Population and Trends

Country Trend Redlisted