Cheimonophyllum

Fungalpedia – Note 348, Cheimonophyllum

Citation if using this entry: Sysouphanthong et al. (in prep.) – Fungalpedia, Basidiomycota 3.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1

Classification: Fungi, Basidiomycota, Agaricomycotina, Agaricomycetes, Agaricales, Cyphellaceae.

Cheimonophyllum is a small saprobic genus belonging to the Cyphellaceae Lotsy., and consisting of four species from temperate zone, with Cheimonophyllum candidissimum [= C. haedinum is the type species (He et al. 2019, Kalichman et al. 2020). Valade & Moreau (2022) transferred Agaricus haedinus to Cheimonophyllum (= C. haedinum), and ITS sequence analysis supported that C. candidissimum is the same species as C. haedinum, that was published earlier. Therefore, the type species of Cheimonophyllum has been changed to C. haedinum. Cheimonophyllum is charaterised by pleurotoid basidiomata, whitish to ivory lamellae, absence of stipe, hyaline globose to subglobose basidiospores, absence of pleurocystidia, cylindrical cheilocystidia with or without branches, trichodermal pileipillis, and presence of clamp connections (Delivorias & Gonou-Zagou 2008, Valade & Moreau 2022). The current molecular studies based on ITS sequences certified that Cheimonophyllum belong to Cyphellaceae (Kalichman et al. 2020, Valade & Moreau 2022). There are four records listed in Index Fungorum (2024) under this genus.

Type species: Cheimonophyllum haedinum (Berk. & M.A. Curtis) Valade & P.-A. Moreau

Synonymy: none

Other accepted species: (Species Fungorum – search Cheimonophyllum)

Figure 1 – Cheimonophyllum candidissimum (= C. haedinum). a Basidiomata. b Lamellar margin. c Basidiospores. d Basidia. e Cheilocystidia. Bars = 10 μm. Redrawn by Monthien phonemany based on publication of Delivorias & Gonou-Zagou (2008).