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SUMMARY
Of thirteen species of hypogeous fungi from Chile collected by Roland Thaxler, Thaxterogaster archeuretus and T. squamatus are here described as new. Genea aff. verrucosa is reported for the first time from South America. Species concepts of Gelopellis macrospora and T. subalbidus are revised. Gautieria chilensis, Hysterangium purpureum, T. fragilis, and T. subalbidus are lectotypified. Data from Thaxter's South American diary help clarify some dates and localities of collection.