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Female reproductive structures of Umaltolepis Krassilov and associated short shoots, buds and leaves of Pseudotorellia Florin from the Middle Jurassic of Angren, Uzbekistan
Review of Palaeobotany and Palynology ( IF 1.7 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.revpalbo.2020.104266 Natalya Nosova
Review of Palaeobotany and Palynology ( IF 1.7 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.revpalbo.2020.104266 Natalya Nosova
Abstract Six species of Umaltolepis, the female organs of certain Pseudotorellia species, have been described previously from the Jurassic and Cretaceous of Iran, China, Central Mongolia and the Russian Far East. Remains of Umaltolepis are here recognized in the Middle Jurassic of Uzbekistan for the first time. Two new species – Umaltolepis sogdianica sp. nov. and U. involuta sp. nov. – are described from the Middle Jurassic Angren Formation (Angren, Uzbekistan). Umaltolepis sogdianica is peculiar in having papillae on the outer cupule cuticle near the lobe base. In contrast to other species, the cupule lobes of U. involuta are characterized by the inward bending of the lobe edges from the base to up to half of the lobe length and papillated epidermal cells of these edges. Reproductive structures of the new species were found in association with leaves of Pseudotorellia vachrameevii and P. gomolitzkyana, one short shoot, and numerous detached buds. Epidermal features of the buds are generally comparable to those of Umaltolepis and Pseudotorellia, but ordinary epidermal cells as well as subsidiary cells of the stomata of the buds, lack any cuticular thickenings and papillae, unlike Pseudotorellia leaves.
更新日期：2020-10-01
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