Graduate Thesis Or Dissertation
 

The taxonomy of the genus Hysterangium (Basidiomycotina, Hysterangiaceae) with notes on its ecology

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  • Hysterangium, a genus of hypogeous Basidiomycotina (false truffles) is commonly placed in the Hysterangiaceae and ascribed affinities to the Phallales. It is a large genus among hypogeous taxa and is commonly collected in large numbers in eastern and western North America, Australasia and Europe. Some Hysterangium species are dominant components of the below-ground mycorrhizal network of Douglas-fir forests in the Pacific Northwest and Eucalyptus forests and plantations in Australia and New Zealand. Sixty-eight species and nine varietal names have been proposed within Hysterangium. This work conserves 25 species names and raises two varieties to species rank. Thirteen species and 7 varietal names are synonomized, and eighteen other species names are transferred to 9 other genera. Placement of an additional 8 species excluded from Hysterangium is uncertain. One species was based on nonsporocarpic material, while no specimens of 3 other species could be located. Eleven new species are provisionally proposed. The scope of this work is worldwide, with a focus on taxonomy and to a limited extent ecology. Due to the pervasiveness of many Hysterangium species in a number of forest communities a better understanding of the taxonomy of Hysterangium has considerable ecological importance.
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