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The Genus Lissoceras (Ammonoidea: Lissoceratidae) in the Upper Bajocian (Middle Jurassic) of the Northern Caucasus, Russia

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Abstract

Ammonites of the genus Lissoceras from the Upper Bajocian of Karachay-Cherkessia are discussed. The new material, represented exclusively by macroconchs of different age stages, makes it possible to clarify the taxonomic composition of this genus in the basin of the Kuban River. The new taxa L. kubanense sp. nov. from the lowermost horizons of the Niortense Zone, and L. paviai sp. nov. from the middle part of this zone, are established. Single specimens of L. meletense (Parona) (upper part of the Niortense Zone), L. ovale Pavia et Fernández-López (lower part of the Garantiana Zone), and L. haugi Sturani (lower part of the Parkinsoni Zone) were found. The description and images of the ammonites are given.

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ACKNOWLEDGMENTS

Many of my domestic and foreign friends and colleagues have been participating in field work in Karachay-Cherkessia for many years. The photographs were taken by S.V. Bagirov (Paleontological Institute, Russian Academy of Sciences). The author is sincerely grateful to all those who contributed to the preparation of this work.

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Correspondence to V. V. Mitta.

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Translated by S. Nikolaeva

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Mitta, V.V. The Genus Lissoceras (Ammonoidea: Lissoceratidae) in the Upper Bajocian (Middle Jurassic) of the Northern Caucasus, Russia. Paleontol. J. 56, 503–509 (2022). https://doi.org/10.1134/S0031030122050094

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