Mosses of Zacatecas, Mexico III. Synthesis and phytogeography
AbstractThis contribution lists 37 new moss taxa from the State of Zacatecas, Mexico. The revised listing includes 115 species and varieties of mosses but unidentified specimens of Atrichum and Grimmia are not yet included. On account of their world distribution the taxa can be grouped in four elements: Wide Distribution, Mexican, Mesoamerican and Endemic. Fifty-seven per cent of this moss flora is widely distributed in Mexico while the remainder is known only from the Neovolcanic Belt northwards. Moss distribution in Zacatecas supports the state subdivision into two phytogeographical provinces: Sierra Madre Occidental and Altiplanicie. This moss flora seems to have originated in Tertiary times.
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