A TAXONOMIC REVISION OF DICRANODONTIUM (MUSCI)

The 39 species of Dicranodontium which are currently included in the g enus are critically revised and reduced to 7. Dicranodontium fleischer ianum Schultze-Motel could not be separated from D. uncinatum (Harv.) Jaeg. and is regarded as synonymous with the latter. Dicranodontium di morphum Mitt. has proven to be synonymous with D. didictyon (Mitt.) Ja eg., D. meridionale Bartr. with D. pulchroalare Broth., D. ceylonense Fleisch., D. subasperum Williams and D, perviride Dir. & P. Varde are synonymous with D, denudatum (Brid.) Britt., D. subintegrifolium Broth ., D. attenuatum (Mitt.) Wils., D. caespitosum (Mitt.) Par. and D. dec ipiens (Mitt.) Mitt. ex Broth. are synonymous with D. didymodon (Griff .) Par., D. blindioides (Besch.) Broth., D. sparsum Dir. are synonymou s with D. uncinatum (Harv.) Jaeg. Dicranodontium sinense (C. Mull.) Pa r. is identical with Campylopus japonicus Broth. and recognized as Cam pylopus sinensis (C. Mull.) J.-P. Frahm comb. nov. Dicranodontium falc atum Broth. (described as endemic from Hawaii) is synonymous with D. p orodictyon Card. & Ther. from China, D. tanganyikae J. Tayl. & P. Vard e is identical with Campylopus flexuosus (Hedw.) Brid. var. incacorral is (Herz.) J.-P. Frahm, D. humilis P. Varde is a species of Blindia, D . interruptum P. Varde is identical with Bryohumbertia filifolia (Homs ch.) J.-P. Frahm, D. horricuspis Card. and D, capillifolium (Dir.) Tak aki are synonymous with D. asperulum (Mitt.) Broth. Dicranodontium bra siliense Herz. is placed as subspecies in D. pulchroalare. Dicranodont ium intermedium Alien is placed into Atractylocarpus and recognized as A, intermedius (Alien) J.-P. Frahm comb. nov. Dicranodontium insularu m Bartr. and D. tristaniense Dir. & Ther. belong to Dicranoloma. Dicra nodontium tenii Broth. described from China is identical with Dicranum hamulosum Mitt. from Japan. Dicranodontium tenuinerve Dir. & Sak. des cribed from Japan is identical with Bryohumbertia subcomosa (Dir.) J.- P. Frahm. Dicranodontium filifolium Broth. seems not to belong to this genus, but its systematic position is dubious. Dicranodontium subporo dictyon Broth. is transferred to the genus Dicranum Hedw. and recogniz ed as D. subporodictyon (Broth.) Gao. The types of Dicranodontium tape s (C. Mull.) Par. and D. papillifolium Gao were not available, but it is very unlikely that these species belong to this genus.