Molecular and Morphological Evidence Challenges the Records of the Extant Liverwort Ptilidium pulcherrimum in Eocene Baltic Amber

@article{Heinrichs2015MolecularAM,
  title={Molecular and Morphological Evidence Challenges the Records of the Extant Liverwort Ptilidium pulcherrimum in Eocene Baltic Amber},
  author={Jochen Heinrichs and Armin Scheben and Gaik Ee Lee and Jiř{\'i} V{\'a}ňa and Alfons Sch{\"a}fer‐Verwimp and Michael Krings and Alexander R. Schmidt},
  journal={PLoS ONE},
  year={2015},
  volume={10}
}
Preservation of liverworts in amber, a fossilized tree resin, is often exquisite. Twenty-three fossil species of liverworts have been described to date from Eocene (35–50 Ma) Baltic amber. In addition, two inclusions have been assigned to the extant species Ptilidium pulcherrimum (Ptilidiales or Porellales). However, the presence of the boreal P. pulcherrimum in the subtropical or warm-temperate Baltic amber forest challenges the phytogeographical interpretation of the Eocene flora. A re… 

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