The Type Specimens of Plectocolea and Solenostoma (Marchantiophyta) in Some Japanese and European Herbaria.

Solenostomataceae are among the most diverse and, at the same time, least described liverwort families in Pacific Asia. Many species therein are known only from type descriptions, which are sometimes incomplete. The present account is based on a study of 81 type specimens belonging to 61 species known mostly in East Asia, although also in other regions; it provides line-art figures and photomicrographs of all the studied taxa. One lectotype and one epitype are designated, and six new combinations are proposed. as Additionally, the indication of a necessity of an epitype for Plectocolea setulosa Herzog is justified.