Auriculariales » Auriculariaceae

Heterocorticium

Heterocorticium S.H. He, T. Nie & Yue Li 2023, in Li et al., Journal of Fungi, 9(318), 7, (2023).

Etymology: “Hetero”: different, refers to the septate basidia; “Corticium”: a generic name of corticioid homobasidiomycetes, refers to the basidiomes similar to Corticium.

Diagnosis: Basidiomes annual, resupinate, effused, closely adnate, inseparable from substrate, thin, coriaceous. Hymenophore smooth, grey, orange to brown; margin thinning out or abrupt, adnate. Hyphal system monomitic; generative hyphae clamped, colorless, thin- to thick-walled, frequently branched, septate. Subiculum indistinct, composed of densely interwoven hyphae. Cystidia absent or present. Dikaryophyses present, colorless, thin-walled, frequently branched. Basidia ovoid or subglobose, longitudinally septate, four-celled, embedded, without enucleate stalk. Basidiospores cylindrical or ellipsoid with an apiculus, colorless, thin-walled, smooth, IKI–, CB–, with oily contents, capable of germinating by repetition.

Index Fungorum Number: IF847441

Type species: Heterocorticium bambusicola S.H. He, T. Nie & Yue Li 2023, in Li et al., Journal of Fungi, 9(318), 7, (2023).

Species:

Heterocorticium bambusicola S.H. He, T. Nie & Yue Li 2023

Heterocorticium latisporum S.H. He, T. Nie & Yue Li 2023

Notes: Heterocorticium is characterized by the resupinate coriaceous basidiomes with smooth, pigmented hymenophores, monomitic hyphal system with clamped generative hyphae, and cylindrical or ellipsoid basidiospores. Macroscopically, Heterocorticium resembles a typical crust, but can be readily distinguished from homobasidiomycetes by its longitudinally septate basidia. Heterocorticium is similar to Exidiopsis and Alloexidiopsis in that they differ by pale-colored basidiomes (Liu et al. 2022; Wells 1961; Wells & Raitviir 1977). The monotypic genus Sclerotrema recently segregated from Exidiopsis is similar to Heterocorticium by sharing a pigmented hymenophore but differs by its distinctly curved allantoid basidiospores and occurrence mainly on Alnus (Malysheva & Spirin 2017; Wells & Raitviir 1977).

 

References:

Li, Y., Nie, T., Nakasone, K. K., Li, H. J., & He, S. H. (2023). Taxonomy and Phylogeny of Corticioid Fungi in Auriculariaceae (Auriculariales, Basidiomycota): A New Genus, Five New Species and Four New Combinations. Journal of Fungi, 9(3), 318.

Liu, S.L., Shen, Z.Q., Li, Q.Z., Liu, X.Y., Zhou, L.W. (2022). Alloexidiopsis gen. nov., A Revision of Generic Delimitation in Auriculariales (Basidiomycota). Frontiers in Microbiology, 13, 894641.

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

Wells, K. (1961). Studies of some Tremellaceae. IV. Exidiopsis. Mycologia, 53(4), 317-370.

Wells, K., & Raitviir, A. (1977). The species of Exidiopsis (Tremellaceae) of the USSR. Mycologia, 69(5), 987-1007.

 

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