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Nick Matzke

Oh wait, I get it now. The paper listed at the end of the post was:

Schaechter, E. (2010) Darwin and the Fermentable Mushrooms of Tierra del Fuego. Fungi 3:15.
...which I couldn't find online.

The paper you were mostly talking about, though, was this one, which is easy to get online:

Cophylogeny and biogeography of the fungal parasite Cyttaria and its host Nothofagus, southern beech

Kristin R. Peterson 1
Donald H. Pfister

Department of Organismic and Evolutionary Biology, Harvard University, 22 Divinity Avenue, Cambridge, Massachusetts 02138

Charles D. Bell

Department of Biological Sciences, University of New Orleans, 2000 Lakeshore Drive, New Orleans, Louisiana 70148

The obligate, biotrophic association among species of the fungal genus Cyttaria and their hosts in the plant genus Nothofagus often is cited as a classic example of cophylogeny and is one of the few cases in which the biogeography of a fungus is commonly mentioned or included in biogeographic analyses. In this study molecular and morphological data are used to examine hypotheses regarding the cophylogeny and biogeography of the 12 species of Cyttaria and their hosts, the 11 species of Nothofagus subgenera Lophozonia and Nothofagus. Our results indicate highly significant overall cophylogenetic structure, despite the fact that the associations between species of Cyttaria and Nothofagus usually do not correspond in a simple one to one relationship. Two major lineages of Cyttaria are confined to a single Nothofagus subgenus, a specificity that might account for a minimum of two codivergences. We hypothesize other major codivergences. Numerous extinction also are assumed, as are an independent parasite divergence followed by host switching to account for C. berteroi. Considering the historical association of Cyttaria and Nothofagus, our hypothesis may support the vicariance hypothesis for the trans-Antarctic distribution between Australasian and South American species of Cyttaria species hosted by subgenus Lophozonia. It also supports the hypothesis of transoceanic long distance dispersal to account for the relatively recent relationship between Australian and New Zealand Cyttaria species, which we estimate to have occurred 44.6–28.5 mya. Thus the history of these organisms is not only a reflection of the breakup of Gondwana but also of other events that have contributed to the distributions of many other southern hemisphere plants and fungi.

Key words: Australasia, Leotiomycetes, long distance dispersal, South America, southern hemisphere, vicariance

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