Euryale tenuicostata is a fossil species of Euryale from the Miocene of Omsk, Russia.
Description The ovoid to oval, 4.3–7.6 mm long, and 2.9–7.1 mm wide seeds have a slightly wrinkled testa.П.И.Дорофеев. (1963). Третичные флоры Западной Сибири. pp. 176–177.
Taxonomy It was first published as Euryale tenuicostata by Pavel Ivanovich Dorofeev in 1959.Euryale tenuicostata P.I. Dorof. (n.d.). The International Fossil Plant Names Index (IFPNI). Retrieved December 18, 2024, from https://www.ifpni.org/species.htm?id=66585D53-C14B-4039-A4DC-04AF72CC1E1E It has been proposed to place it in a separate genus Irtyshenia as Irtyshenia tenuicostata published by Pavel Ivanovich Dorofeev in 1972.Ископаемые цветковые растения СССР: Том 1 Magnoliaceae-Eucommiaceae. p. 67. (1974). Russland: Изд-во "Наука", Ленинградское отд-ние.Irtyshenia tenuicostata (P.I. Dorof.) P.I. Dorof. (n.d.). The International Fossil Plant Names Index (IFPNI). Retrieved December 18, 2024, from https://www.ifpni.org/species.htm?id=BB13734D-A393-46C0-AA9F-AD7212C00F9B Later it was proposed to place it in the genus Pseudoeuryale as Pseudoeuryale tenuicostata published by Alexander Borisovitch Doweld in 2022.Doweld A.B. 2022. New names of fossil Nymphaeaceae and allied forms. Geophytology 52(1&2): 1–28.Pseudoeuryale tenuicostata (P.I. Dorof.) Doweld. (n.d.). The International Fossil Plant Names Index (IFPNI). Retrieved December 18, 2024, from https://www.ifpni.org/species.htm?id=8326A252-0BF5-AFAA-587C-8B0BE1CAE03E
Distribution Fossils of E. tenuicostata occur in what is now Russia.
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