Basionym Name:Pyrenastrum tokyoense Müll. Arg., [as 'tokyense'] Nuovo G. bot. ital. 24(3): 202 (1892)
Homotypic synonyms:Pyrenula tokyoensis (Müll. Arg.) H. Harada, [as 'tokyensis'], in Harada, Okamoto & Yoshimura, Lichenology 2(2): 132 (2004)