Ceratobasidium gomesae E.S. Cruz, Meir. Silva, M.C.M. Kasuya

Cruz, Everaldo Da S., Freitas, Emiliane F. S., Silva, Meiriele Da, Pereira, Olinto L. & Kasuya, Maria C. M., 2022, A new mycorrhizal species of Ceratobasidium (Ceratobasidiaceae) associated with roots of the epiphytic orchid Gomesa recurva from Brazilian Atlantic Forest, Phytotaxa 550 (3), pp. 224-232 : 227-228

Ceratobasidium gomesae E.S. Cruz, Meir. Silva, M.C.M. Kasuya s p. nov. ( Fig. 2 )

Mycobank: MB 842012

Systematic position: Basidiomycota, Agaricomycotina, Agaricomycetes, Cantharellales , Ceratobasidiaceae .

Type: — BRAZIL. Minas Gerais: Parque Estadual Serra do Brigadeiro, from roots of Gomesa recurva R.Br. (Orchidaceae) , September 2019, Cruz, E.S. (Holotype VIC 47413 , ex-type living culture COAD 3147 ) .

Etymology:—Name derived from the plant host species Gomesa recurva .

Colonies on PDA growing 51 mm in 3 d, flat with entire edges, dense aerial mycelium, white; reverse of the colony white to cream. Hyphae are regularly septate branching out at right angles, with 3.2–6.1 µm in diameter (± SD = 4.7 ± 0.59 µm), hyaline, with binucleated cells and thick walls. Monilioid cells hyaline, elongated in shape of a barrel, 10.1–12.7 µm de diam. (± SD = 11.1 ± 0.76 µm), branched chains with more than four cells. Sexual structure not observed.

Additional specimens examined:— BRAZIL. Minas Gerais: Parque Estadual Serra do Brigadeiro, from roots of Gomesa recurva R.Br. (Orchidaceae) , September 2019, Cruz, E.S. VIC 47414 (COAD 3148), VIC 47415 (COAD 3149), VIC 47416 (COAD 3150), VIC 47717 (COAD 3151), VIC 47418 (COAD 3152), VIC 47419 (COAD 3153), VIC 47420 (COAD 3154), VIC 47421 (COAD 3155).

Figures

FIGURE 2. Ceratobasidium gomesae COAD 3147. (a) Three-day-old PDA culture; (b) Hyphae stained with SYBR Green I and Calcofluor showing binucleate cells (N = nuclei; S = septa); (c) Hyphae with branching at right angles; (d) Monilioid cell chains in CMA. Scale bars C and D = 20 µm; B = 25 µm.