The macro- and micromorphology of 45 specimens and 19 holotypes of the subgenus Ganoderma (=G. lucidum complex) were
examined, together with isoenzymic data. The objective was to evaluate relationships by analysing numerically morphological and
isoenzymic data to discern the number of species occurring in southern South America, and their delimitation. A total of 73 isozymic
bands and 26 morphological characters were considered. Spore ornamentation was studied under SEM. Nine taxa appear to be
represented in the region (G. lucidum var. lucidum, G. multiplicatum, G. sessiliforme, G. praelongum, G. subincrustatum, G. platense, G.
zonatum, G. sessile and G. tuberculosum) and the presence of another eight is doubtful (G. argillaceum, G. bibadiostraum, G. chaffangeonii,
G. lucidum var. capense, G. lucidum var. dorsale, G. subamboinense var. laevisporum, G. resinaceum and G. tropicum). Three major cutis
types were defined and illustrated. Although congruence between dendrograms derived from both data sets was low, some similar
groupings were formed. Species descriptions and a key for identification are provided.