Abstract
The stratigraphically important ostracod genera Plumhoffia Brand, 1990 (family Cytheruridae) and Aaleniella Plumhoff, 1963 (family Eucytheridae) from the Upper Bajocian and Lower Bathonian of the Volga Region (Sokur Section, Saratov Region) and central Russia (Obval Borehole, Penza Region) are revised, and updated and expanded descriptions are provided. Four species are described. A neotype is designated for Plumhoffia tricostata (Khabarova, 1955); three others: Aaleniella franzi, A. volganica, and A.? ovoidea are described as new. Their distribution along the Sokur reference section of the Upper Bajocian (Michalskii ammonite Zone)–Lower Bathonian (Besnosovi ammonite Zone) of the Volga Region allows development of detailed ostracod-based biostratigraphy and correlation of the sections studied with synchronous deposits of Western Europe.
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1134%2FS0031030122020125/MediaObjects/11492_2022_1526_Fig1_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1134%2FS0031030122020125/MediaObjects/11492_2022_1526_Fig2_HTML.png)
Similar content being viewed by others
Notes
When describing the hinge, the dental formula is used, where the first figure corresponds to the number of sequences of anterior tooth [that in square brackets characterizes the structure of a groove, if the preservation allows counting the number of pits], and the last digit is the number of sequences of posterior tooth.
REFERENCES
Bate, R.H., Middle Jurassic Ostracoda from South Yorkshire, Bull. Brit. Mus. Natur. Hist. Geol., 1963, vol. 9, no. 2, pp. 21–46.
Bate, R.H. and Coleman, B.E., Upper Lias Ostracoda from Rutland and Huntingdonshire, Bull. Geol. Surv. G.B., vol. 1975, no. 55, pp. 1–42.
Brand, E., Biostratigraphische Untergliederung des Ober-Bathonium im Raum Hildesheim, Nordwestdeutschland mittels Ostracoden und Korrelation ihrer Vertikalreichweiten mit Ammoniten-Zonen, Geol. Jb. Reihe A, 1990, vol. 121, pp. 119–273.
Brand, E. and Malz, H., Die Arten der Gattung Glyptocythere Brand et Malz, 1962 im NW-deutschen Dogger, Senckenb. lethaea, 1966, vol. 47, nos. 5/6, pp. 481–535.
Christensen, O.B. and Kilenyi, T.I., Ostracod biostratigraphy of the Kimmeridgian in Northern and Western Europe, Geol. Surv. Denmark. II Ser., 1970, no. 95, pp. 1–65.
Franz, M., Beher, E., and Dietl, G., The Bathonian and Early Callovian Ostracoda of Baden-Wuerttemberg, southern Germany, N. Jb. Geol. Paläontol. Abh., 2014, vol. 274, nos. 2–3, pp. 149–185.
Franz, M., Ebert, M., and Stulpinaite, R., Aalenian–Lower Bajocian (Middle Jurassic) ostracods from the Geisingen clay pit (SW Germany), Palaeodiversity, 2018, vol. 11, pp. 59–105.
Gulyaev, D.B., Ammonites and infrazonal stratigraphy of the Lower Bathonian Besnosovi Zone of the Russian Plate, Stratigr. Geol. Correl., 2019, vol. 27, no.1, pp. 95–117.
Khabarova, T.N., Ostracods from the Middle Jurassic of the Saratov Region and the northern areas of the Stalingrad Region, Trudy Vsesoyuz. Neft. Nauch.-Issled. Geol.-Razved. Inst. Nov. Ser., 1955, vol. 84, pp. 192–197.
Khabarova, T.N., The microfauna from Jurassic deposits of the Saratov Region, Tr. Vsesoyuz. Neft. Nauch.-Issled. Geol.-Razved. Inst., 1961, Iss. 29, vol. 3, pp. 177–184.
Kilenyi, T.I., The Ostracoda of the Dorset Kimmeridge Clay, Palaeontology, 1969, vol. 12, pp. 112–160.
Knitter, H., Biostratigraphische Untersuchungen mit Ostracoden im Toarcien Süddeutschlands, Facies, 1983, vol. 8, pp. 213–262.
Kolpenskaya, N.N., Ostracod assemblages from Middle–Upper Jurassic of the Belgorod Region (the southwestern slope of the Voronezh anteclise), Tr. Nauch. Issled. Inst. Geol. SGU. Nov. Ser., 2002, vol. 11, pp. 116–122.
Mitta, V., Kostyleva, V., Dzyuba, O., et al., Biostratigraphy and sedimentary settings of the Upper Bajocian–Lower Bathonian in the vicinity of Saratov (Central Russia), N. Jb. Geol. Paläontol., 2014, vol. 271, no. 1, pp. 95–121.
Ohmert, W. and Franz, M., Die Forschungsbohrung Pfullingen-Breitenbach (Baden-Württemberg), LGRB-Informationen, 2021, vol. 32, pp. 79–95.
Permjakova, M.N., Zonal subdivision of Bajocian ostracods of the Dnieper–Donets Depression in the Donbass environs, Dop. AN URSR. Ser. B, 1968, no. 8, pp. 689–692.
Permjakova, M.N., Ostracods of the genus Glyptocythere from Middle Jurassic deposits of the Dnieper–Donets Depression, in Paleontol. Sb. L’vov. Univ. (Coll. Paleontol. Res. Lvov Univ.), 1970, vol. 1, no. 7, pp. 61–67.
Permjakova, M.N., Ostracods of the genus Palaeocytheridea from the Middle Jurassic of the Dnieper-Donets Depression, in Paleontol. Sb. L’vov. Univ. (Coll. Paleontol. Res. Lvov Univ.), 1974, vol. 2, no. 11, pp. 61–66.
Plumhoff, F., Ostracoden des Oberaalenium und tiefen Unterbajocium (Jura) des Gifhorner Troges, Nordwestdeutschland, Abh. Senckenb. Naturf. Ges., 1963, vol. 503, pp. 1–100.
Prakticheskoe rukovodstvo po mikrofaune SSSR. T. 3. Ostrakody kainozoya (Practical Guide on the Microfauna of the USSR. Vol. 3: Ostracods of the Cenozoic), Sokolov, B.S, Ed., Leningrad: Nedra, 1989.
Prakticheskoe rukovodstvo po mikrofaune. T. 7. Ostrakody mezozoya (Practical Guide on the Microfauna of the USSR. Vol. 7: Ostracods of the Mesozoic), Sokolov, B.S, Ed., St. Petersburg: Vseross. Nauchno-Issled. Geol. Inst., 1999.
Preobrazhenskaya, V.N., Significance of ostracods for the Jurassic stratigraphy of the KMA, in Geologiya i poleznye iskopaemye Tsentral’no-Chernozemnykh oblastei. Trudy. Mezhobl. Geol. Soveshch. (Trans. Interreg. Geol. Conf. “Geology and Mineral Resources of the Central Black Earth Regions”), Voronezh: Voronezh. Gos. Univ., 1964, pp. 179–183.
Preobrazhenskaya, V.N., Stratigrafiya otlozhenii yury i nizov nizhnego mela territorii TsChO (Stratigraphy of Jurassic and lowermost Lower Cretaceous Deposits in the Central Black Earth Region), Voronezh: Voronezh. Gos. Univ., 1966.
Pyatkova, D.M. and Permjakova, M.N., Foraminifery i ostrakody yury Ukrainy (Foraminifers and Ostracods from the Jurassic of Ukraine) Kyiv: Nauk. Dumka, 1978.
Riegraf, W., Mikrofauna, biostratigraphie und fazies im unteren Toarcium Südwestdeutschlands und Vergleiche mit benachbarten Gebieten, Tübinger Mikropaläontol. Mitt., 1985, no. 3.
Sheppard, L.M., Middle Jurassic Ostracoda from Southern England and Northern France. Thesis Ph.D (Univ. London, 1981).
Shurupova, Y.A. and Tesakova, E.M., Detailed biostratigraphic scales as based on the palaeobiogenetical approach (an example of the Upper Bajocian–Lower Bathonian ostracod scale of the Russian Platform), Volumina Jurassica, 2017, vol. 15, pp. 1–17.
Shurupova, Ya.A., Tesakova, E.M., Kolpenskaya, N.N., et al., Saratov Volga Region in Late Bajocian (Middle Jurassic): Paleogeography, reconstructed by ostracods, Zhizn’ Zemli, 2016, vol. 38, no. 1, pp. 22–37.
The International Code of Zoological Nomenclature, 4th ed., London: Trust for Zoological Nomenclature, 1999.
Tesakova, E.M., Biostratigraphie du Jurassique moyen des sondages Benken et Schlattingen-1 (Nord de la Suisse) ètablie sur la base de la répartition des ostracodes, NAGRA Arbeitsbericht NAB, 2017, vol. 17-41.
Tesakova, E.M., Franz, M., Baykina, E., and Beher, E., A new view on Bathonian ostracods of Poland, Senckenb. Lethaea, 2008, vol. 88, no. 1, pp. 55–65.
Ustinova, M.A., Upper Bajocian–Lower Bathonian foraminifers of the Penza Region, in Mater. VII Vseross. soveshch. “Yurskaya sistema Rossii: problemy stratigrafii i paleogeografii,” Moskva, 18–22 sentyabrya 2017 g. (Proc. VII All-Russ. Conf. “Jurassic System of Russia: Problems of Stratigraphy and Paleogeography,” Moscow, September 18–22, 2017), Zakharov, V.A., Rogov, M.A., and Shchepetova, E.V., Eds., Moscow: Geol. Inst. Russ. Acad. Sci., 2017, pp. 225–229.
Wakefield, M.I., Middle Jurassic (Bathonian) Ostracoda from the Inner Hebrides, Scotland, Palaeontogr. Soc. Monogr., 1994, vol. 148, no. 596.
Wannenmacher, N., Dietze, V., Franz, M., and Schweigert, G., New records of ostracods and ammonites from the Aalenian (mainly Concavum Zone) of the Zollernalb (Swabian Alb, SW Germany), Zitteliana, 2021, vol. 95, pp. 1–55.
ACKNOWLEDGMENTS
I am very grateful to N.A. Kolpenskaya (Geologorazvedka, St. Petersburg) and Ya.A. Shurupova (MSU) for cleaning samples from the Sokur Borehole, selection, and initial identification of ostracods. I am also grateful to L.A. Glinskikh (IPGG SB RAS) for providing ostracods from 13 samples (Sokur Section), A.S. Alekseev (MSU) for providing cleaned samples from the Obval Borehole section, and Ya.A. Shurupova for taking SEM images of some ostracods from the Sokur Borehole. I sincerely thank A.V. Chereshinsky (VSU) for the selection of samples from the Obval Borehole section, R.A. Voinova (MSU) for cleaning these samples, V.B. Seltser (SSU) for assistance in sampling the Sokur Borehole section, and A.V. Ivanov (IG RAS) for the initiative, funding, and great effort to drill a borehole in the Sokur quarry. A special thanks to Dr. Matthias Franz (LGRB) for discussing genera Plumhoffia and Aaleniella, and my reviewers L.M. Melnikova (PIN RAS) and M.A. Karpuk (GIN RAS) for discussing the manuscript and for valuable pieces of advice that helped to improve the paper.
Funding
This work was performed within the framework of state assignments nos. 0135-2019-0062 (GIN RAS) and АААА-А16-116033010096-8 (MSU).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The author declares that she has no conflicts of interest.
Additional information
Translated by D. Voroshchuk
Rights and permissions
About this article
Cite this article
Tesakova, E.M. Late Bajocian and Early Bathonian Ostracods of the Russian Plate. Part I: Genera Plumhoffia Brand and Aaleniella Plumhoff. Paleontol. J. 56, 173–186 (2022). https://doi.org/10.1134/S0031030122020125
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0031030122020125