Abstract
SummaryThe initial use of the name Mnium in the generic sense contained not only species of mosses but two liverworts as well, namely, M. trichomanis L. and M.fissum L. These hepatic species, now regarded as validly published in accordance with the I.C.B.N., have long been recognized as segregates within the genus Calypogeja Raddi. Although lectotypes had been selected for these two taxa sometime ago, those specimens are at odds with the original protologue of Linnaeus and must be superseded. Further, study of authentic specimens of the taxa in question reveals that neither name has been used in the sense of the original author and they are proposed here as nomina rejicienda under Art. 69. If rejected, a new name would be needed to accommodate those elements previously referred to as Calypogeja fissa sensu Raddi et auct. div. which is unequivocally shown to be the equivalent of M. trichomanis L. Additionally C. fissa sensu the Linnaean basionym, is shown to be conspecific with C. arguta Mont. et Nees which could then replace C. fissa as the earliest legitimate name available. Calypogeja trichomanis sensu Müller and modern authors is regarded as a species nova (C. azurea Stotl. et Crotz) since it cannot be correlated with any previous legitimate name.
Published Version
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