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Glyptorthis (Foerste, 1914) and Bassettella new genus (Brachiopoda: Orthida) from the Late Ordovician of the east Baltic

  • Michael A. Zuykov (a1) and Susan H. Butts (a2)
Extract

The Genus Glyptorthis Foerste, 1914 is a rare component of the Late Ordovician to early Silurian brachiopod faunas of the East Baltic. Hints and Röömusoks (1997) reported on the occurrence of Glyptorthis in seven stratigraphie levels within the Upper Caradoc, Ashgill and Llandovery, in a paper summarizing the stratigraphy of Estonia. To date, however, very few of these brachiopods have been studied in detail. Three species from the Ashgill and Llandovery were established by Rubel (1962) and Röömusoks (1970), whereas some unnamed Caradoc taxa were listed only in the latter paper. Collections made since 1987 by S. S. Terentiev and M. A. Zuykov revealed that rare specimens of Glyptorthis-like brachiopods occur in fossiliferous lower Caradocian (Idavere Regional Stage) strata in the western part of the St. Petersburg region, northwestern Russia. These specimens, assigned herein to a new glyptorthid genus and species Bassettella gracilis, comprise the core of this paper. Moreover, generic affinities of Estonian species from the Ashgill currently assigned to Glyptorthis are discussed. The type specimen of J. Hall (1847) in the American Museum of Natural History (New York) and specimens from the type area in the Sch¨chtert Brachiopod Collection in the Peabody Museum of Natural History, Yale University (New Haven), have been investigated for comparative purposes.

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References
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Brett, C. E. and Algeo, T. J. 2001. Sequence stratigraphy of Upper Ordovician and Lower Silurian strata of the Cincinnati Arch region, p. 3446. In Algeo, T. J. and Brett, C. E. (eds.), 1999 Field Trip Guidebook 1. Sequence, Cycle, and Event Stratigraphy of Upper Ordovician and Silurian Strata of the Cincinnati Arch region. Kentucky Geological Survey in conjunction with the 1999 Field Conference of the Great Lakes Section SEPM-SSG and the Kentucky Society of Professional Geologists, Series XII. University of Kentucky, Lexington, Kentucky.
Cooper, G. A. 1956. Chazyan and related brachiopods. Smithsonian Miscellaneous Collections, 127:11245.
Foerste, A. F. 1914. Notes on the Lorraine Faunas of New York and the Province of Quebec. Denison University, Scientific Laboratories, Bulletin (Granville), 17:247328.
Hall, J. 1847. Containing descriptions of the organic remains of the Lower Division of the New York System. Palaeontology of New York, 1:1338.
Hints, L. 1997. Haljala Stage, p. 7374. In Raukas, A. and Teedumäe, A. (eds.), Geology and Mineral Resources of Estonia. Estonian Academy Publishers, Tallinn.
Hints, L. and Meidla, T. 1997. Vormsi Stage, p. 8182. In Raukas, A. and Teedumäe, A. (eds.), Geology and Mineral Resources of Estonia. Estonian Academy Publishers, Tallinn.
Hints, L. and Rõõmusoks, A. 1997. Ordovician articulate brachiopods, p. 226228. In Raukas, A. and Teedumäe, A. (eds.), Geology and Mineral Resources of Estonia. Estonian Academy Publishers, Tallinn.
Howe, H. J. 1988. Articulate brachiopods from the Richmondian of Tennessee. Journal of Paleontology, 62:204218.
Jaanusson, V. 1995. Confacies differentiation and upper Middle Ordovician correlation of the Baltoscandian Basin. Proceedings of the Estonian Academy of Science, Geology, 44:7386.
Männil, R. and Meidla, T. 1994. The Ordovician System of the East European Platform (Estonia, Latvia, Lithuania, Belorussia, parts of Russia, Ukraine and Moldova), p. 152. In Webby, B. D., Ross, R. J., and Zhen, Y. Y. (eds.), The Ordovician System of the East European Platform and Tuva (southeastern Russia). IUGS Publication, 28.
Nikiforova, O. I. and Andreeva, O. N. 1961. Stratigrafiya ordovika i silura Sibirskoi platformy i ee paleontologicheskoe obosnovanie (brachiopody). Trudy vsesoyuznogo nauchno-issledovatelskogo geologicheskogo instituta (VSEGEI), Novaya seriya, 56, 411 p. (In Russian)
Nõlvak, J. 1997. Ordovician. Introduction, p. 52. In Raukas, A. and Teedumäe, A. (eds.), Geology and Mineral Resources of Estonia. Estonian Academy Publishers, Tallinn.
Rõõmusoks, A. 1964. Nekotorye brakhiopody iz ordovika Estonii. Tartu Riikliku Ulikooli Toimetised, 153:328. (In Russian)
Rõõmusoks, A. 1970. Stratigraphy of the Viru and Harju series (Ordovician) of the north Estonia. Valgus, Tallinn, 346 p.
Rubel, M. 1962. Brachiopods of the superfamily Orthacea from the Llandovery of Estonia. Proceedings of the Estonian Academy of Science, Geology, 9:7595.
Zuykov, M. A. and Hints, O. 2001. The Gryazno Formation (early Caradoc) in western part of St. Petersburg region. Abstract Meeting of Working Group on Ordovician Geology of Baltoscandia, Copenhagen: 3132.
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Journal of Paleontology
  • ISSN: 0022-3360
  • EISSN: 1937-2337
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