Abstract
An assemblage of species of the genus Baylea (B. subpenea (Netchaev, 1894), B. vjatkensis Mazaev, 2015, B. praeburtasorum sp. nov., and B. shilovskyi sp. nov.) from the Lower Kazanian Substage (Middle Permian) is described. It is shown that this assemblage is phylogenetically connected with the Late Kazanian species B. rigida Mazaev, 2015, B. foraminata Mazaev, 2015, B. chimbulatiensis Mazaev, 2015, B. nemdaensis Mazaev, 2015, and B. burtasorum (Golowkinsky, 1868). Index species of three stratigraphic intervals are recognized: B. praeburtasorum sp. nov.–B. shilovskyi sp. nov., B. rigida–B. foraminata, and B. burtasorum. The morphology and polymorphism of the studied species are discussed.
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Barskov, I.S., Leonova, T.B., and Shilovsky, O.P., Middle Permian cephalopods of the Volga–Ural Region, Paleontol. J., 2014, vol. 48, no. 13, pp. 1331–1414.
Batten, R.L., Permian Gastropoda of the southwestern United States: 7. Pleurotomariacea: Eotomariidae, Lophospiridae, Gosseletinidae, Am. Mus. Novit., 1989, no. 2958, pp. 1–64.
Girty, G.H., Paleontology of the Manzano Group, Bull. US Geol. Surv., 1909, vol. 389, pp. 41–136.
Knight, J.B., Gastropods of the Whitehorse sandstone, Bull. Geol. Soc. Am., 1940, vol. 51, pp. 302–315.
Knight, J.B., Some new genera of Paleozoic gastropods, J. Paleontol., 1945, vol. 19, no. 6, pp. 573–587.
Kotlyar, G.V., Ganelin, V.G., Zhuravlev, A.V., et al., Conditions of the formation and fauna of the Lower Kazanian beds in the stratotypic region, in Geologiya i mineral’nye resursy Evropeiskogo severo-vostoka Rossii. XIV geologicheskii s”ezd Respubliki Komi (XIV Geological Congress of the Komi Republic on the Geology and Mineral Resources of the European Northeast of Russia), 2004, vol. 3, pp. 258–260.
Kotlyar, G.V., Zhuravlev, A.V., Kossovaya, O.L., and Shishlov, S.V., Sections of the Kazanian Stage on the Nemda River, in Verkhnii paleozoi Rossii: stratigrafiya i paleogeografiya (Upper Paleozoic of Russia: Stratigraphy and Paleogeography), Kazan: Kazan. Gos. Univ., 2007, pp. 162–170.
Kues, B.S. and Batten, R.L., Middle Pennsylvanian gastropods from the Flechado Formation, North-Central New Mexico, J. Palaeontol., 2001, vol. 75, suppl. no. 1, pp. 1–95.
Leonova, T.B., Roadian ammonoids in the northern regions of the globe, in Evolyutsiya biosfery i bioraznoobraziya (Evolution of the Biosphere and Biodiversity), Moscow: KMK, 2006, pp. 540–551.
Leonova, T.B., Ammonoids of the Kazanian Stage, in Materialy V mezhdunarodnoi konferentsii “Paleontologiya i stratigrafiya permi i triasa Severnoi Evrazii” (V International Conference on the Paleontology and Stratigraphy of the Permian and Triassic of Northern Eurasia), Moscow, 2010, pp. 83–86.
Leonova, T.B., Esaulova, N.K., and Shilovsky, O.P., The first record of Kazanian ammonoids in the Volga–Ural Region, Dokl. Ross. Akad. Nauk., 2002, vol. 383, no. 4, pp. 509–511.
Leonova, T.B., Kutygin, R.V., and Shilovsky, O.P., New data on the composition and development of the Permian superfamily Popanocerataceae (Ammonoidea), Paleontol. Zh., 2005, no. 5, pp. 20–29.
Leonova, T.B. and Shilovsky, O.P., Development of the Permian family Spirolegoceratidae (Goniatitida, Ammonoidea), Paleontol. Zh., 2007, no. 1, pp. 27–36.
Licharev, B.K., Fauna from the Permian beds in the vicinity of the city of Kirillov, Novgorod Region, Tr. Geol. Kom. Nov. Ser. 1913, vol. 85, no. 3, pp. 1–14.
Licharev, B.K., Data on the fauna from the Upper Permian beds of the Northern Region, Tr. Glav. Geol.–Razved. Upr. VSNKh SSSR, 1931, vol. 71, pp. 1–42.
Mazaev, A.V., Pennsylvanian gastropods of the suborders Murchisoniina Cox et Knight, 1960 and Sinuspirina Mazaev subordo. nov. from the central regions of the Russian Platform: Morphology, taxonomy, and phylogeny, Paleontol. J., 2011, vol. 45, no. 12, pp. 1533–1599.
Mazaev, A.V., Upper Kazanian (Middle Permian) gastropods of the Volga–Ural Region, Paleontol. J., 2015, vol. 49, no. 8, pp. 869–986.
Netchaev, A.V., Fauna from the Permian beds of the eastern belt of European Russia, Tr. Ob–va Estestvoispyt. Kazan. Imp. Univ., 1894, vol. 27, no. 4, pp. 1–503.
Noinskii, M.E., Some data on the structure and facies character of the Kazanian Stage in the Prikazanskii District, Izv. Geol. Kom., 1924, vol. 43, no. 6, pp. 565–622.
Postanovleniya MSK i ego postoyannykh komissii (Resolution of the International Stratigraphic Committee and Its Constant Commissions), St. Petersburg: VSEGEI, 2006, vol. 36.
Postanovleniya MSK i ego postoyannykh komissii (Resolution of the International Stratigraphic Committee and Its Constant Commissions), St. Petersburg: VSEGEI, 2010, vol. 39.
Sloan, R.E., The Carboniferous gastropod genus Glabrocingulum Thomas, Fieldiana Geol., 1955, vol. 10, no. 22, pp. 275–281.
Solodukho, M.G., Kazanian deposits of the Nemda River Basin, Uch. Zap. Kazan. Univ. Geol., 1954, vol. 114, no. 3, pp. 127–143.
Solodukho, M.G. and Tikhvinskaya, E.I., Substantiation of division of the Kazanian Stage into horizons, in Materialy po stratigrafii verkhnei permi na territorii SSSR (Data on the Stratigraphy of the Upper Permian in the Territory of the USSR), Kazan: Kazan. Gos. Univ., 1977, pp. 187–219.
Waagen, W.H., Productus limestone fossils: Part II, Palaeontol. Indica, Ser. 13, 1880, col. 1, no. 2, pp. 73–183.
Yochelson, E.L. and Saunders, B.W., A bibliographic index of North American Late Paleozoic Hyolita, Amphineura, Scaphopoda, and Gastropoda, Bull. US Geol. Surv., 1967, vol. 1210, pp. 1–271.
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Original Russian Text © A.V. Mazaev, 2016, published in Paleontologicheskii Zhurnal, 2016, No. 6, pp. 45–59.
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Mazaev, A.V. Evolution of the genus Baylea (Gastropoda) in the Kazan Paleobasin (Middle Permian, Volga–Ural Region). Paleontol. J. 50, 585–600 (2016). https://doi.org/10.1134/S0031030116060101
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DOI: https://doi.org/10.1134/S0031030116060101