Briofitos de las tierras altas de la Guayana Venezolana: hepáticas del Roraima-tepui I

63 liverworts are reported from the Venezuelan side of the Roraima-tepui, with information about their habitat, taxonomy and geographical distribution. The species correspond to 37 genera and 17 families. Six (6) new species reports are given for Venezuela, 23 new records for the Roraima-tepui and 8 for Venezuelan Guayana.