Rhizoctonia terrigena (Bres.) Oberw. et al.

publication ID	https://doi.org/10.3114/persoonia.2025.54.09
DOI	https://doi.org/10.5281/zenodo.16877704
persistent identifier	https://treatment.plazi.org/id/03A69C14-FF80-FF80-FFE3-F9CF659A4B0A
treatment provided by	Felipe
scientific name	Rhizoctonia terrigena (Bres.) Oberw. et al.
status

Thanatephorus terrigenus (Bres.) G. Langer, Biblioth. Mycol. 158: 324. 1994.

Type citation: ‘Hab. ad terram, augusto.’ [‘On soil, August.’]. Roberts (1999) cites ‘B. Eichler, S’ as holotype.

Notes: Parker-Rhodes (1954) believed that R. terrigena (or Cb. terrigenum at the time) was best placed outside of Ceratobasidium based on morphological differences from the type of the name Ceratobasidium , Cb. calosporum . Consequently, Parker-Rhodes attempted to erect the genus Hydrabasidium to accommodate this taxon; however, due to a lack of description or diagnosis for this proposed genus name, the name is invalid (Art. 38.1) ( Eriksson et al. 1978). Thus, the intended combination “ Hydrabasidium terrigenum (Bres.) Park.-Rhodes ” is also invalid (Art. 35.1). Eriksson et al. (1978) later validated the name Hydrabasidium as Hydrabasidium Parker-Rhodes ex Erikss. & Ryv. , albeit with Hypochnus subviolaceus Peck designated as the type for this name [as Hydrabasidium subviolaceum (Peck) Erikss. & Ryv ], without mention of Hydrabasidium terrigenum . Hydrabasidium subviolaceum was transferred to Scotomyces by Jülich (1979), making Hydrabasidium a synonym of Scotomyces . Notably, Hydrabasidium and Scotomyces share the exact same date of publication, December 28, 1978, and therefore the choice by Jülich (1979) to adopt Scotomyces over Hydrabasidium establishes the priority of the former name (Art. 11.5.).