Dendrominia Ghobad-Nejhad & Duhem, in Mycological Progress 13: 7 (2014)
Etymology: Dendrominia, a combination from the generic names Dendrothele and Vuilleminia.
Diagnosis: Dendrominia is characterized by a resupinate and smooth basidiocarp, monomitic hyphal system with or without clamps, with fine amorphous crystals on hyphae, large, cylindrical-clavate basidia with four sterigmata, lack of cystidia, presence of dendrohyphidia, and lunate to allantoid basidiospores.
Basidiocarp resupinate, smooth, decorticating or not, closely adnate, white to whitish cream, ceraceous to crustaceous, surface finely farinose, margin distinct. Hyphal system monomitic, hyphae with or without clamps, narrow, thin-walled, encrusted with fine amorphous crystals. Subiculum lacking. Basidia large, long cylindrical-clavate, flexuose, arising from inflated basidioles (probasidia), with four stout sterigmata, with or without a basal clamp, contents granular. Cystidia lacking. Dendrohyphidia present. Basidiospores lunate to allantoid, contents granular, walls smooth, thin, CB−, IKI−.
Index Fungorum number: IF801547
Type species: Dendrominia maculata (H.S. Jacks. & P.A. Lemke) Ghob-Nejh. & Duhem, in Mycological Progress 13: 7 (2014)
Notes: Dendrominia shares some features with Dendrothele Höhn. & Litsch. sensu lato, e.g., crystallized hyphae, large basidia and presence of dendrohyphidia. However, as shown by several recent molecular studies (e.g., Binder et al. 2005, Larsson 2007, Nakasone 2012) Dendrothele is highly polyphyletic, and its fine circumscription in a strict sense is still lacking. Yet most of the species presently assigned to Dendrothele grow on bark, have cystidia and cyanophilous, thick-walled basidiospores, while Dendrominia species may grow on bark or not, lack cystidia, and have thin-walled CB− basidiospores (Nakasone 2012). Dendrominia differs from Vuilleminia by its basidiocarp texture (ceraceous to crustaceous in the former, mostly gelatinous in the latter) and lack of clamp in some of its species.
Dendrominia burdsallii Nakasone 2014
Dendrominia dryina (Pers.) Ghob.-Nejh. & Duhem 2013
Dendrominia ericae (Duhem) Ghob.-Nejh. & Duhem 2013
Dendrominia maculata (H.S. Jacks. & P.A. Lemke) Ghob.-Nejh. & Duhem 2013
Binder M, Hibbett DS, Larsson KH, Larsson E, Langer E, Langer G. (2005). The phylogenetic distribution of resupinate forms across the major clades of mushroom-forming fungi (homobasidiomycetes). Syst Biodivers 3:113–157
Ghobad-Nejhad, M.; Duhem, B. (2014). Novelties in the Corticiales: Vuilleminia nilsii sp. nov. and Dendrominia gen. nov. (Basidiomycota). Mycological Progress. 13:1-11
Larsson K.H. (2007). Re-thinking the classification of corticioid fungi. Mycol Res 111:1040–1063
Nakasone K.K. (2012). Tsugacorticium kenaicum (Hymenochaetales, Basidiomycota), a new corticioid genus and species from Alaska. North Am Fungi 7:1–9