The genus Theissenia: T. pyrenocrata, T. cinerea sp. nov., and T. eurima sp. nov

  title={The genus Theissenia: T. pyrenocrata, T. cinerea sp. nov., and T. eurima sp. nov},
  author={Yu-Ming Ju and Jack D. Rogers and Huei-Mei Hsieh},
  pages={109 - 116}
The diagnosis of Theissenia is emended to include taxa that lack a definite central perithecial columella and taxa that feature ascospores with a germ slit. Theissenia cinerea is described as a new species that lacks a perithecial columella; T. eurima is described as a new species with ascospores having a germ slit. The type species, T. pyrenocrata, is redescribed and compared with the new species. The taxonomic position of Theissenia is discussed. 

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