Abstract
The genus Calypogeia Raddi is represented in India by six species (Singh, 2001). All the six species are found in Eastern Himalaya with three species, C. aeruginosa Mitt., C. fissa (L.) Raddi and C. marginella Mitt., restricted to this region alone in Indian bryoflora. Of the remaining three, C. arguta Nees & Mont. is common to Eastern Himalaya, Central India, South India and the Andaman and Nicobar Islands; C. azurea Stotler & Crotz occurs in both Eastern and Western Himalaya and South India and C. lunata Mitt. is common to Eastern as well as Western Himalaya (Mitten, 1861; Chopra, 1943; Sharma & Srivastava, 1993; Singh & al., 2008). During the course of study on the liverworts and hornworts of Mehao Wildlife Sanctuary in Arunachal Pradesh, Eastern Himalaya, the authors came across an interesting species of the genus Calypogeia Raddi. Detailed morphotaxonomic study of the species and study of relevant literature (Bischler, 1962a, 1962b; Srivastava & Sharma, 1986; Sharma & Srivastava, 1993; Paton, 1999) revealed it to be a hitherto undescribed species of the genus. The same has been described and illustrated as C. udarii in the present communication.
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