Synonyms: Aspidium crameri; Aspidium gymnogrammoides; Aspidium krameri; Carpogymnia oyamensis (homotypic); Currania gracilipes; Currania oyamensis (homotypic); Currania oyamensis gracilipes; Currania oyamensis var. gracilipes; Currania oyamensis var. incisa; Dryopteris genuflexa; Dryopteris gracilipes; Dryopteris gymnogrammoides; Dryopteris oyamensis (homotypic); Gymnocarpium gracilipes; Gymnocarpium oyamense gracilipes; Gymnocarpium oyamense var. gracilipes; Gymnocarpium oyamense var. kusamae; Gymnocarpium oyamense var. kusamii; Nephrodium gymnogrammoides; Nephrodium krameri; Phegopteris gymnogrammoides; Phegopteris krameri; Phegopteris oyamensis (homotypic); Polypodium gymnogrammoides; Polypodium krameri; Polypodium krameri incisum; Polypodium krameri var. incisum; Polypodium oyamense (homotypic)