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Paleontological Journal

, Volume 43, Issue 1, pp 107–114 | Cite as

The most ancient terrestrial lichen Winfrenatia reticulata: A new find and new interpretation

  • I. V. Karatygin
  • N. S. Snigirevskaya
  • S. V. Vikulin
Article

Abstract

Silicified fossils from Rhynie cherts in Scotland are studied. A lichen belonging to the genus Winfrenatia is detected and studied. This oldest terrestrial lichen is dated to the Pragian (=Siegenian) of the Early Devonian. New characters of the lichen are described, and their new interpretation is given. The main component of the lichen thallus is a filamentous cyanobacterium (Nostocales). Structures which were interpreted as fungal hyphae are probably hollow sheaths of this cyanobacterium. Mycobiont hyphae develop at the base of the thallus and symbiose with a coccoid cyanobacterium. Thus, Winfrenatia reticulata is a three-parted organism, constituted of a mycobiont and filamentous and coccoid cyanobacteria.

Key words

lichens cyanobacteria Early Devonian symbiosis fossils coevolution 

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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • I. V. Karatygin
    • 1
  • N. S. Snigirevskaya
    • 1
  • S. V. Vikulin
    • 1
  1. 1.Komarov Botanical InstituteRussian Academy of SciencesSt. PetersburgRussia

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