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Uromyces vankyorum sp. nov. and Uromyces atriplicis, putative vicariant rust species of Patagonian and Australian semi-desert biomes

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Abstract

Uromyces vankyorum (Basidiomycota, Uredinales) growing on Atriplex lampa in the cool Patagonian dwarf shrub semi-desert is described as a new species and a new member of the Argentinean rust mycota. The fungus is morphologically similar to Uromyces atriplicis on Atriplex vesicaria from halophytic shrublands of South Australia. U. atriplicis seems to be derived from U. vankyorum as indicated by its shortened life cycle lacking the urediniospore stage.

The species are interpreted as trans-pacific vicariants and represent one of the rare examples for the austral South American-Australasian element among rust fungi. The disjunct distribution of rust fungi between austral South America, Australia and New Zealand is reviewed and discussed. Available data suggest migration of rust fungi along Gondwanan land bridges rather than long-distance dispersal of spores by air currents.

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  1. Botanical Institute, Systematic Botany and Mycology, University of Tübingen, Auf der Morgenstelle 1, D-72076, Tübingen, Germany

    Reinhard Berndt

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  1. Reinhard Berndt
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Part 198 of the series “Studies in Heterobasidiomycetous Fungi” of the Botanical Institute, University of Tübingen

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Berndt, R. Uromyces vankyorum sp. nov. and Uromyces atriplicis, putative vicariant rust species of Patagonian and Australian semi-desert biomes. Mycol Progress 1, 179–186 (2002). https://doi.org/10.1007/s11557-006-0017-8

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