A new synonym of Weissia jamaicensis (Pottiaceae, Bryophyta), and extension of its range from the Neotropics to the Palaeotropics

Tortella opaca, an African moss species described from Victoria Falls in Zimbabwe, is taxonomically assessed and stated to be conspecific with Neotropical Weissia jamaicensis. A lectotype of Tortella opaca is selected. The discovery of Weissia jamaicensis in Uíge Province, northern Angola, and in Lusaka Province, Zambia, is reported. Diagnostic features of W. jamaicensis are given in relation to similar species and are illustrated, and the phytogeographic importance of its records in the Palaeotropics is highlighted.