Rhizoctonia pennata (Currah) O’Donnell, R. P., Linde, C. C. & May, T. W., 2025

O’Donnell, R. P., Linde, C. C. & May, T. W., 2025, Rise up, Rhizoctonia: moving to one fungus, one name in the Ceratobasidiaceae (Agaricomycetes, Cantharellales), Persoonia 54 (1), pp. 285-325 : 310

publication ID	https://doi.org/10.3114/persoonia.2025.54.09
DOI	https://doi.org/10.5281/zenodo.16877690
persistent identifier	https://treatment.plazi.org/id/03A69C14-FF84-FF84-FFE2-FA6F63E549AA
treatment provided by	Felipe
scientific name	Rhizoctonia pennata (Currah)
status	comb. nov.

Treatment

Rhizoctonia pennata (Currah) R.P. O’Donnell, C.C. Linde & T.W. May, comb. nov. MB 852073 View Materials .

Basionym: Thanatephorus pennatus Currah, Canad. J. Bot. View in CoL 65 (9): 1958. 1987.

Type citation: ‘ TYPUS: cultura exsiccata “ UAMH 5405,” ex radicis Calypso bulbosa, Albertiensis. ’ [‘ TYPE: dried culture “ UAMH 5405,” from the roots of Calypso bulbosa , from Alberta.’].

ITS barcode: EU218892 View Materials ( T).

UNITE 1.5 % SH: SH0814614.10FU.

Ex-type culture: ATCC 64683 (=UAMH 5405).

Notes: Roberts (1999) considered Thanatephorus pennatus a synonym of Th. ochraceus ; however, the publicly-available ‘type’ sequence attributed to Th. ochraceous by Taylor & McCormick (2008) was actually sequenced from the holotype of Th. pennatus . Coniophora ochracea (the basionym of Th. ochraceus ) was described from decaying elm bark in England, while Th. pennatus was isolated from roots of the orchid Calypso bulbosa collected from Alberta, Canada. Donk (1958) and Roberts (1999) also note that the type specimen for Coniophora ochracea is apparently lost. Given the differences in type locality and host substrate between Th. pennatus and Th. ochraceus , along with the fact that the true type specimen for Th. ochraceus is lost, it would appear prudent to treat Th. pennatus and Th. ochraceus as separate from one another. Consequently, we have here chosen to resurrect the name Th. pennatus as Rhizoctonia pennata .