Calomnion is a genus of mosses in the family Rhizogoniaceae. They have been reported from Australia, New Zealand, Polynesia, Melanesia, New Guinea, and eastern Indonesia.Vitt, D. H. 1991. A new species of Calomnion (Bryopsida) from Lord Howe Island. Novon 1: 53–55.Vitt, D. H. 1995. The genus Calomnion (Bryopsida): taxonomy, phylogeny, and biogeography. Bryologist 98: 338–358.
Classification The genus was originally placed within its own family, the Calomniaceae, with the genus Nadeaudia. Nadeudia contained one species, Nadeaudia schistostegiella, which is now considered a synonym for Calomnion schistostegiellum.
Species included in the genus are:The Plant List Calomnion brownseyi Vitt & H.A. Mill. Calomnion ceramense Vitt Calomnion complanatum (Hook. f. & Wilson) Lindb. (type species) Calomnion denticulatum Mitt. Calomnion iwatsukii Vitt Calomnion lillianiae Vitt & H.A. Mill. Calomnion melanesicum H.A. Mill. Calomnion milleri Vitt Calomnion schistostegiellum (Besch.) Wijk & Margad.
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