AKIYAMA, H. 1992. Taxonomic studies of mosses of Seram and Ambon (Moluccas, East Malesia) collected by Indonesian-Japanese botanical expeditions. V. Hypopterygiaceae. Acta Phytotax. Geobot. 43:111-120, illus. — 9 species, 1 new comb. in Cyathophorum. ARTS, T. & P. SOLLMAN. 1991. Remarks on Phascum leptophyllum C. Müll., an earlier name for Tortula rhizophylla (Sak.) Iwats. & K. Saito. Lindbergia 17: 20-27, illus. — Synonymy; taxonomical position uncertain; new record for Malesia (Papua New Guinea).