Sheard J.W.
(1977):
Paleogeography, chemistry and taxonomy of lichenized Ascomycetes Dimelaena and Thamnolia,
Bryologist,
80: 100-118
World distribution of the species of Dimelaena and Thamnolia,
and chemical variants, are considered in relation to current concepts of continental
drift. It is concluded that both genera date from the Permian-Triassic and
paleogeographies of species and chemotypes are presented which are consistent
with the established sequence of continental movements. In addition, longdistance
dispersal has probably occurred in both species of Thamnolia. Seven
chemotypes of Dimelaena oreina are now known …
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