Williamsonia Carruthers 1870

Cycadeoideopsida - Bennettitales

Parent taxon: Bennettitales according to J. Watson and C. A. Sincock 1992

Sister taxa: Bennetticarpus, Bennettistemon, Bennettitaceae, Cycadeoidea, Cycadeospermum, Cycadolepis, Monanthesia, Nilssoniopteris, Otozamites, Pseudocycas, Pterophyllum, Ptilophyllum, Sphenozamites, Weltrichia, Wielandiella, Williamsoniaceae, Williamsoniella, Zamites

Subtaxa: Williamsonia gigas Williamsonia sewardiana

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Type: Williamsonia gigas

Distribution:

• Cretaceous of Canada (1: Alberta collection), Spain (1), United States (1: Wyoming)

• Jurassic of Afghanistan (1), Antarctica (2), Argentina (2), Australia (1), China (2), France (6), Georgia (1), Germany (1), India (1), Iran (2), Israel (1), Japan (2), Kazakhstan (2), Mexico (8), Romania (2), the Russian Federation (6), Tajikistan (3), Ukraine (1), the United Kingdom (9), Uzbekistan (2)

• Triassic of Antarctica (1), Mexico (5), the Russian Federation (2), United States (2: New Mexico, North Carolina)

Total: 68 collections including 92 occurrences

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Specimen images are retrieved through the ePANDDA API.


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