Auriculariales » Auriculariaceae


Sclerotrema Spirin & Malysheva, in Fungal Biology 121(8): 712 (2017)

Etymology: skleros’ (Greek, adj.) – dry, and trema’ – a reference to tremellaceous fungi, an artificial group encompassed many heterobasidiomycetes.

Diagnosis: Basidiocarps perennial, orbicular, often fusing together. Hymenophore smooth, greyish brown. Hyphal structure monomitic, hyphae clamped, sometimes irregularly inflated, hyaline. Cystidia present. Basidia ellipsoid-ovoid to subglobose, longitudinally septate, constantly four-celled, embedded. Basidiospores hyaline, allantoid, distinctly curved, with oily inclusions. On dry branches and logs of deciduous trees.

Index Fungorum number: IF818036

Type species: Sclerotrema griseobrunneum (K. Wells & Raitv.) Spirin & Malysheva, in Fungal Biology 121 (8): 696 (2017)

Notes: The genus was described to accommodate one species, formerly addressed to the genus Exidiopsis. In the protologue, Raitviir & Wells (1966) pointed to the similarity of E. griseobrunnea and E. alliciens; however, DNA data do not support their close relationships. Exidiopsis spp. (E. effusa, E. grisea etc.) differ from Sclerotrema in having annual (except E. calcea) and lightcoloured basidiocarps, gelatinized at least at earlier stages of their development.


Figure 1. Combined phylogenetic nrITS D nrLSU topology from Maximum likelihood analysis showing main lineages within Auriculariales. The collection number (voucher or isolate) is given for each specimen. Support values (PP values in BI/BS values in ML/BS values in MP) are given above the branches. Scale bar shows expected changes per site.



Malysheva V, Spirin V. (2017). Taxonomy and phylogeny of the Auriculariales (Agaricomycetes, Basidiomycota) with stereoid basidiocarps. Fungal Biology. 121(8): 689-715

Raitviir A, Wells K. (1966) Two new species of Exidiopsis. Eesti NSV Teaduste Akadeemia Toimetised 15: 206209


About Basidiomycota

The webpage Basidiomycota provides an up-to-date classification and account of all genera of the phylum Basidiomycota.


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Thailand Science Research and Innovation (TSRI)

project entitled:

"Macrofungi diversity research from the Lancang-Mekong Watershed and surrounding areas"

(Grant No. DBG6280009)


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