Abstract
An extended generic diagnosis of Pseudoprotophyllum is given on the basis of new data from Late Cretaceous floras of Northern Asia. Both peltate and apeltate morphological types are included in the genus. The morphological diversity is described in the type species P. boreale (Dawson) Hollick from the Cenomanian-Turonian of North America and four North Asiatic species: P. minimum I. Lebed. , P. sibiricum I. Lebed., P. hatangaense Abramova, and P. giganteum Sveshn. et Budants. The geographical and stratigraphic analyses show that Pseudoprotophyllum evolved in Northern Asia since the Cenomanian until Campanian and was restricted to the Siberian-Canadian floristic region with a warm-temperate humid climate.
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Golovneva, L.B. The morphology, taxonomy, and occurrence of the genus Pseudoprotophyllum Hollick (Platanaceae) in Late Cretaceous floras of Northern Asia. Paleontol. J. 43, 1230–1244 (2009). https://doi.org/10.1134/S0031030109100050
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DOI: https://doi.org/10.1134/S0031030109100050