Freshwater ascomycetes: Jahnula apiospora (Jahnulales, Dothideomycetes), a new species from Prince Edward Island, Canada

@article{Raja2008FreshwaterAJ,
  title={Freshwater ascomycetes: Jahnula apiospora (Jahnulales, Dothideomycetes), a new species from Prince Edward Island, Canada},
  author={Huzefa A. Raja and Adrian Dr Carter and Harold W. Platt and Carol A. Shearer},
  journal={Mycoscience},
  year={2008},
  volume={49},
  pages={326-328}
}
A new ascomycete species, Jahnula apiospora (Jahnulales, Dothideomycetes), collected from submerged wood in a freshwater creek on Prince Edward Island, Canada, is described and illustrated. The characteristic features of the new species are globose to subglobose, black, ostiolate, membranous ascomata with broad, brown, subtending hyphae; a peridial wall composed of an outer layer of thick-walled cells occluded by black, amorphous material along the upper two-thirds of the ascoma; trabeculate… 
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A new order is introduced ( Jahnulales ) to accommodate ascomycetes with stalked/sessile and dimorphic ascomata, hyphal stalk cells that are ca 40 μm wide, and ascospores that are unequally 2-celled
Jahnula species from North and Central America, including three new species
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Three new species of loculoascomycetes collected from freshwater habitats in North America are described as newspecies of Jahnula ( Jahnulales, Dothideomycete), reported for the first time from the western hemisphere.
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Thirty-one ascomycetes from seven north temperate lakes in Wisconsin are described and illustrated, and 12 species are reported from freshwater for the first time.
Phylogenetic Relationships Among Taxa in the Jahnulales Inferred From 18S and 28S Nuclear Ribosomal DNA Sequences
TLDR
A molecular study carried out using 18S and 28S rDNA sequence data from 15 species representing the four genera in the Jahnulales suggested that the presence of very wide, brown, septate hyphae is an important character defining the J Kahnulales.
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