The Late Cretaceous Pterophyllum (Bennettitales) in the North-East of Russia |
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| Institution: | 1. Illinois State Geological Survey, University of Illinois at Urbana-Champaign, 615 East Peabody Drive, Champaign, IL 61820, USA;2. Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA;1. A.A. Borissiak Paleontological Institute, Russian Academy of Sciences, Profsoyusnaya 123, Moscow 117647, Russia;2. Komarov Botanical Institute, Russian Academy of Sciences, ul. Professora Popova 2, St. Petersburg 197376, Russia;3. Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690022, Russia |
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| Abstract: | The Late Cretaceous Pterophyllum species survived as relict elements in areas influenced by volcanism in the North-East of Russia. Two new species are described: P. philippoviae Gnilovskaya from the Turonian-Coniacian deposits of the Vetvinskaya Unit (Penzhina and Oklan Rivers interfluve, Magadan Region) and P. terechoviae from the Maastrichtian deposits of the Kakanaut Formation (Kakanaut River Basin, Koryak Upland). The upper boundary of Pterophyllum stratigraphic range is extended from the Turonian-Coniacian up to the K/Pg boundary. Pterophyllum terechoviae is the youngest member of the genus and probably the latest occurrence of Bennettitales in the Northern Hemisphere. |
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| Keywords: | Okhotsk-Chukotka volcanogenic belt Late Cretaceous relicts North-East of Russia |
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