Bryophyte flora of the Huon Peninsula, Papua New Guinea. LXX. Sematophyllaceae (Musci) 1. Acanthorrhynchium, Acroporium, Clastobryophilum, Pseudopiloecium, Radulina and Trichosteleum

Abstract

The family Sematophyllaceae (Musci) of western Melanesia, mainly Papua New Guinea, is revised based on recent collections preserved at the Botanical Museum of the University of Helsinki. For western Melanesia, 18 genera and ca. 80 species of Sematophyllaceae have been reported in the literature. Of these, six genera, Acanthorrhynchium M. Fleisch. (one species), Acroporium Mitt. (16 species), Clastobryophilum M. Fleisch. (one species), Pseudopiloecium Bartr. (one species), Radulina W.R. Buck & B.C. Tan (four species), and Trichosteleum Mitt. (seven species), are treated in this paper. Trichosteleum streimannii B.C. Tan, T.J. Kop. & D.H. Norris is decribed as new for science. Three new combinations are made and 12 new synonyms proposed (indexed). Trichosteleum sematophylloides Dix. is lectotypified. Six taxa are reported as new to Papua New Guinea: Acroporium adspersum (Hampe) Broth., A. microcladon (Dozy & Molk.) B.C. Tan var. burleyii B.C. Tan, A. rigens (Dix.) Dix., A. stramineum (Reinw. & Hornsch.) M. Fleisch. var. hamulatum (M. Fleisch.) B.C. Tan, Pseudopiloecium acroporoides (Dix.) B.C. Tan, T.J. Kop. & D.H. Norris, and Radulina hamata (Dozy & Molk.) W.R. Buck & B.C. Tan var. scaberula (Mont.) B.C. Tan, T.J. Kop. & D.H. Norris. In addition, 14 taxa are reported as new to the Solomon Islands (indexed). A key to all species dealt with is provided, and illustrations provided for the new species and species not previously illustrated. The taxonomy, habitat ecology, and distribution in western Melanesia, as well as total ranges, are given for every species. A selection of previously published illustrations and an index of epithets of taxa dealt with are given. © Finnish Zoological and Botanical Publishing Board 2007.