| Summary: | Codriophorus corrugatus Bednarek-Ochyra is described and illustrated as a species new to science. It is closely related to C. anomodontoides (Cardot) Bednarek-Ochyra & Ochyra and C. fascicularis (Hedw.) Bednarek-Ochyra & Ochyra from which it differs in its long subulate, often serpentine leaf acumen which is distinctly corrugate or ruffled in the upper part and markedly cristate or papillose-crenulate at the apex; much longer peristome teeth; and its costa that extends to about mid-leaf and is bistratose in transverse section and flat on the ventral surface. Codriophorus corrugatus is an east-Asian northwestern North American, disjunct, boreal-montane species known from southern Alaska in North America; Yakutia in Arctic Russia; Kamchatka in the Russian Far East; Sichuan, Quinghai, and Shaanxi provinces in China; and Hokkaido in Japan.
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