ISSN 0031-0301, Paleontological Journal, 2019, Vol. 53, No. 2, pp. 203–213. © Pleiades Publishing, Ltd., 2019. Russian Text © M.V. Tekleva, S.V. Polevova, E.V. Bugdaeva, V.S. Markevich, Sun Ge, 2019, published in Paleontologicheskii Zhurnal, 2019, No. 2, pp. 94–105. Further Interpretation of Wodehouseia spinata Stanley from the Late Maastrichtian of the Far East (China) M. V. Teklevaa, *, S. V. Polevovab, E. V. Bugdaevac, V. S. Markevichc, and Sun Ged aBorissiak Paleontological Institute, Russian Academy of Sciences, Moscow, 117647 Russia bMoscow State University, Moscow, 119991 Russia cFederal Scientific Center of the East Asia Terrestrial Biodiversity, Vladivostok, 690022 Russia dCollege of Paleontology, Shenyang Normal University, Shenyang, Liaoning Province, China *e-mail:
[email protected] Received May 25, 2018; revised September 30, 2018; accepted October 15, 2018 Abstract—Dispersed pollen grains Wodehouseia spinata Stanley of unknown botanical affinity from the Maastrichtian of the Amur River Region, Far East are studied using transmitted light, scanning and trans- mission electron microscopy. The pollen was probably produced by wetland or aquatic plants, adapted to a sudden change in the water regime during the vegetation season. The pattern of the exine sculpture and spo- roderm ultrastructure suggests that insects contributed to pollination. The flange and unevenly thickened endexine could facilitate harmomegathy. A tetragonal or rhomboidal tetrad type seems to be most logical for Wodehouseia pollen. The infratectum structure suggests that Wodehouseia should be placed within an advanced group of eudicots. Keywords: Wodehouseia, exine morphology, sporoderm ultrastructure, “oculata” group, Maastrichtian DOI: 10.1134/S0031030119020126 INTRODUCTION that has lost its flange (see a review Wiggins, 1976).