Acaulosporoid glomeromycotan spores with a germination shield from the 400-million-year-old Rhynie chert

@article{Dotzler2008AcaulosporoidGS,
  title={Acaulosporoid glomeromycotan spores with a germination shield from the 400-million-year-old Rhynie chert},
  author={Nora Dotzler and Christopher Walker and Michael Krings and Hagen Hass and Hans Kerp and Thomas N. Taylor and Reinhard Agerer},
  journal={Mycological Progress},
  year={2008},
  volume={8},
  pages={9-18}
}
Scutellosporites devonicus from the Early Devonian Rhynie chert is the only fossil glomeromycotan spore taxon known to produce a germination shield. This paper describes a second type of glomeromycotan spore with a germination shield from the Rhynie chert. In contrast to S. devonicus, however, these spores are acaulosporoid and develop laterally in the neck of the sporiferous saccule. Germination shield morphology varies, from plate-like with single or double lobes to tongue-shaped structures… 
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