Rhizoctonia cornigera (Bourdot) Zmitr. Biol. Bull. Rev.

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 : 303

publication ID	https://doi.org/10.3114/persoonia.2025.54.09
persistent identifier	https://treatment.plazi.org/id/03A69C14-FF8F-FF8F-FF13-FF2F679F4E0A
treatment provided by	Felipe
scientific name	Rhizoctonia cornigera (Bourdot) Zmitr. Biol. Bull. Rev.
status

Treatment

Rhizoctonia cornigera (Bourdot) Zmitr. Biol. Bull. Rev. 14 (Suppl. 1): S33. 2024.

Basionym: Corticium cornigerum Bourdot, Rev. Sci. Bourbonnais Centr. France. 35 (1): 15. 1922.

Synonyms: Ceratobasidium cornigerum (Bourdot) D.P. Rogers, Stud. Nat. Hist. View in CoL Iowa Univ. 17 (1): 5. 1935.

Rhizoctonia cerealis E.P. Hoeven View in CoL , Netherlands J. Pl. Pathol. 83 (5): 191. 1977, nom. inval. ( Table 3).

Ceratorhiza cerealis (E.P. Hoeven) View in CoL R.T. Moore, Mycotaxon 29: 94. 1987, nom. inval. ( Table 3).

Ceratobasidium cereale View in CoL D.I. Murray & Burpee, Trans. Brit. Mycol. Soc. 82 (1): 172. 1984.

Type citation: ‘Vere et aestate, ad caules putrescentes Helianthi tuberosi , Saint-Priest-en-Murat. ‘[‘Spring and summer, on putrescent stems of Helianthus tuberosus , Saint-Priest-en-Murat’]. Roberts cites the collection ‘Allier, St. Priest, on rotting stalks of Helianthus tubersosus , 13 May 1913, H. Bourdot 9355 PC’ as holotype.

ITS barcode: AJ301903 View Materials ( R).

UNITE 1.5 % SH: n/a.

Alternative markers: ATP6 = DQ301576 View Materials ; RPB2 = DQ301707 View Materials ; TEF 1 = DQ301645 View Materials .

Notes: Refer to notes for R. ramicola and R. lantanae-camarae . The type of R. cornigera has not been sequenced. Oberwinkler et al. (2013) note that Cb. cornigerum is a broadly circumscribed taxon with no clear preference with respect to host or nutritional mode. The taxon is likely a species complex which contains several distinct taxa. Sequences from a CBS culture (CBS 132.82) identified as Cb. cornigerum in the analyses of Oberwinkler et al. (2013) generated by Gónzalez et al. (2001) were selected as representative sequences in this study. The synonymy of R. cerealis with R. cornigera follows Roberts (1999). Bondartseva & Zmitrovich (2024) transferred Cb. cornigerum to Rhizoctonia and noted (p. S33) that “If synonymy of Ceratobasidium cornigerum with Rhizoctonia goodyerae-repentis or Rh. fragariae is confirmed by modern methods for assessing taxonomic distance, one of these names should be used in the application to this species. If all three names are synonyms, the priority should be given to Rh. goodyerae-repentis .” However, we note that R. fragariae is an invalid name ( Table 3), and R. goodyerae-repentis is considered a name of uncertain application (see notes under R. fusispora ; Table 4).