A Middle Devonian Callixylon (Archaeopteridales) from Ronquières, Belgium

@inproceedings{Cornet2012AMD,
  title={A Middle Devonian Callixylon (Archaeopteridales) from Ronqui{\`e}res, Belgium},
  author={Luc Cornet and Philippe Gerrienne and Brigitte Meyer-Berthaud and Cyrille Prestianni},
  year={2012}
}
article i nfo A permineralized Callixylon trunk is reported from Ronquieres, a mid to late Givetian (Middle Devonian) locality from Belgium. The specimen consists of an 80 cm long trunk adpression whose central area is pre- served as a pyrite permineralization. The pyritized area is composed of a eustele surrounded by secondary xylem. Tracheids show radially aligned groups of pits separated by unpitted regions on the radial walls of tracheids. The specimen belongs to a group of species… CONTINUE READING

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