Claviceps humidiphila [equivalent to C. purpurea var. phalaridis] was previously typified with the holotype collected by Tanda in Japan and an epitype from Bavaria, Germany. Phylogenetic analyses based on translation elongation factor 1-alpha (TEF1-α) and RNA polymerase II second largest subunit (RPB2) indicated that the previously designated epitype from Germany was not conspecific with the Japanese species.
The German specimen is proposed as a new species, C. bavariensis, and a specimen collected from the type location (Chiba, Japan) is designated as a neotype for C. humidiphila, replacing the lost holotype.