Taxonomic notes on the pantropical generaMacromitriumandMacrocoma(Bryopsida: Orthotrichaceae)

Abstract

New synonyms and distribution records are presented for the genera Macromitrium Brid. and Macrocoma (Hornsch. ex Mü ll.Hal.) Grout. Macromitrium seemannii Mitt., Macromitrium macropelma Mü ll.Hal. and Macromitrium nitidum Hook. f. & Wilson are placed in synonymy with Macromitrium microstomum (Hook. & Grev.) Schwä gr. This species is recorded as new to Malawi. Macromitrium scleropodium Besch. is synonymized with Macromitrium orthostichum Nees ex Schwä gr. Macrocoma orthotrichoides (Raddi) Wijk & Margad. is recorded as new to Africa (Uganda).

Taxonomic notes on African Orthotrichaceae I. New synonymy inMacromitrium

“…African Distribution: Known from Cameroon, Gabon, Madagascar, Uganda, Zimbabwe, Democratic Republic of the Congo and Réunion (Wilbraham, 2007); reported here new to Tanzania. World Distribution: Tropical Africa, Thailand, Sumatra, Java, North Borneo, Sulawesi, The Moluccas, Philippines (Luzon, Mindanao, Mindoro), New Guinea and Tahiti (Vitt et al, 1995).…”

Bryophyte Flora of Uganda. 8. Orthotrichaceae Part 1 – Macromitrioideae

“…Elsewhere in Africa it is known from Cameroon, Gabon, Madagascar, Réunion, Rio Muni and Zaire (Wilbraham, 2007). It also occurs in tropical Asia (Vitt et al, 1995).…”

“…This group has many features that are atypical for Macromitrium, such as the slender habit and branch leaves with short basal cells (Wilbraham, 2007).…”

“…This species mostly has a neotropical distribution with disjunct populations in Uganda (Wilbraham, 2007) and northern India (Parihar, Lal & Raj, 1975).…”

Macromitrium erythrocomum (Bryophyta: Orthotrichaceae), a new species from tropical Queensland, Australia

“…Taxonomic revisions in the genus have dealt primarily with geographical regions, including New Zealand (Vitt 1983), Australia Ramsay 1985a, 2012), Papua New Guinea (Vitt et al 1995), Mexico (Vitt 1994), Central America (Allen 1998(Allen , 2002, Africa (van Rooy and van Wijk 1992, Magill and van Rooy 1998, Wilbraham 2007, 2008, 2015, India (Gangulee 1976), Japan (Noguchi 1967), some Pacific Islands (Miller and Whittier 1990) and Indochina (Tan and Iwatsuki 1993). More recently a series of publications on Macromitrium in China (Jing et al 2007, Guo et al 2006 and New Caledonia (Thouvenot and Bardat 2010;Yong 2015, Thouvenot and and the Philippines, Malaysia and Indonesia (Guo et al 2006, Yong 2016 have increased knowledge for Asia and New Caledonia, but so far no world-wide revision has been undertaken.…”