Fossil Sites
An anatomically preserved cone of Williamsonia has been discovered in Campanian rocks of Vancouver Island. This was the first reproductive structure of Williamsoniaceae to be recovered from western North America. Bennettitalean cones (8 centimetres (3.1 in) in length and 6 centimetres (2.4 in) in diameter) from the Crato Formation of Brazil may belong to Williamsonia, as well as finds from the Gristhorpe Beds of Cayton, England (in this case the specific species W. leckenbyi). In addition, W. harrisiana has been described from the Rajmahal Hills of India, as well as W. nizhonia from the Chinle Formation of New Mexico.
Read more about this topic: Williamsonia (plant)
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