Rhizoctonia ramicola

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 : 311

publication ID	https://doi.org/10.3114/persoonia.2025.54.09
persistent identifier	https://treatment.plazi.org/id/03A69C14-FF87-FF87-FF13-FA2F62844ACA
treatment provided by	Felipe
scientific name	Rhizoctonia ramicola
status

Treatment

Rhizoctonia ramicola View in CoL W.A. Weber & D.A. Roberts, Phytopathology 41: 618. 1951.

Synonyms: Ceratorhiza ramicola (W.A. Weber & D.A. Roberts) R.T. Moore, Mycotaxon 29: 94. 1987.

Ceratobasidium ramicola C.C. Tu et al. View in CoL , Mycologia 61: 781. 1969.

Type citation: ‘ On living twigs, petioles, and leaf blades of Elaeagnus pungens, Thun., Gainesville , Florida, U. S.A. Dried specimen deposited in the University of Florida Agricultural Experiment Station Herbarium, number F-41694 .’

ITS barcode: DQ278931 View Materials ( T).

UNITE 1.5 % SH: SH0814574.10FU.

Alternative markers: ATP6 = DQ301577 View Materials ; RPB2 = DQ301708 View Materials ; TEF 1 = DQ301646 View Materials .

Ex-type culture: CBS 133.82.

Notes: Roberts (1999) considered R. ramicola to be synonymous with a broadly circumscribed Cb. cornigerum . No type has been designated for Cb. cornigerum ; however, it was described from a locality in France from rotting stems of Helianthus tuberosus . In contrast, R. ramicola was described from living twigs, petioles, and leaf blades of Pittosporum tobira and Elaeagnus pungens in the United States. The ex-type sequence of R. ramicola used in this study is placed in the UNITE database as SH0814574.10FU, and sequences from this species hypothesis occur in the Americas, Indonesia, and several localities in Europe. With this considered, given the distinctions between R. ramicola and Cb. cornigerum in host plants, the differences in their pathology (leaf blight vs root rot), and the geographical distance between their type localities, it would be prudent at this stage to consider the two as distinct entities and we recognise them here as such with the resurrection of the name R. ramicola and the transfer of the name Cb. cornigerum to Rhizoctonia .