Sphenobaiera
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Sphenobaiera ikorfatensis (Seward) Florin f. papillata Samylina has been found in Lower Cretaceous formations of Western Greenland, the Upper Jurassic of the Asiatic USSR, Upper Triassic, Lower Jurassic in Iran and the basal rock unit of the Lakota formation of the Black Hills, which Fontaine considered to be of Lower Cretaceous age. It is a ginkgophyte.
Sphenobaiera has also been found in the Upper Triassic period Santa Maria Formation of Brazil.

