Abstract
Foam from eight streams in boreal and mixed-wood forests in Québec were sampled in early and late fall 2002 to evaluate the biodiversity of their aquatic hyphomycete communities. Two regions were studied: 53–54°N and 46–49°N. A total of 54 species were identified. Twenty taxa were found only in the northern region, and four were unique to the southern region. A new aquatic hyphomycete, Dwayaangam colodena sp. nov., was found mostly in northern streams. It is described along with its taxonomic position.
The authors thank Franck O. Stefani and J.P. Doyon for their help during the expeditions to collect samples, ÉChauvet for his comments on the manuscript and Madame Cécile Deconinck for the fine drawings. We also thank the Natural Sciences and Engineering Research Council of Canada for supporting this work. The Centre québécois de valorisation des biotechnologies (CQVB) supported travel grants for S. Sokolski to Toulouse, France. The authors are grateful to the unknown reviewers who gave advised comments.