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PUBLISHED
SINCE 1952

Estonian Journal of Earth Sciences

ISSN 1736-7557 (Electronic)
ISSN 1736-4728 (Print)

Open Access Journal

CiteScore: 1.4

Impact Factor (2022): 1.1

A new glyptorthid species (Brachiopoda: Orthida) from the Upper Ordovician of Estonia; pp. 189–194

PDF | doi: 10.3176/earth.2010.3.01

Author

Linda Hints

Abstract

A new glyptorthid brachiopod species Bassettella alata with surface pits and lamellose frills is described from the Upper Ordovician Haljala and Keila stages of northern Estonia. The new species appears in the Jõhvi Substage of theHaljala Stage (mid-Sandbian) and is somewhat younger than the type species B. gracilis appearing in the lower Idavere Substage of the same stage in NW Russia. In the uppermost Keila Stage (lowermost Katian), B. alata belongs to a mixed faunal association of the marginal facies of the Vasalemma Formation comprising the oldest Ordovician reefs in Estonia. The distribution pattern of brachiopods of the genus Bassettella shows a westward shift in time and changes in shell morphology from subrectangular to subtriangular with alate cardinal extremities.

References

Cooper, G. A. 1956. Chazian and related brachiopods. Smithsonian Miscellaneous Collections, 127 (I–II), 1–1245, pls 1–269. Smithsonian Institution, Washington.

Dronov, A. 2005. Ordovician of St. Petersburg Region. In 6th Baltic Stratigraphical Conference. Cambrian and Ordovician of St. Petersburg Region. Guidebook of the Pre-Conference Field Trip (Dronov, A., Tolmacheva, T., Raevskaya, E. & Nestell, M., eds), pp. 5–9. Saint Petersburg.

Hansen, J. 2008. Upper Ordovician brachiopods from the Arnestad and Frognerkilen formations in the Oslo-Asker district, Norway. PALAEONTOS, 13, 1–99.

Hints, L. 1990. Vasalemma quarry. In Field Meeting Estonia 1990. An Excursion Guidebook (Kaljo, D. & Nestor, H., eds), pp. 128–131. Tallinn.

Hints, L. & Meidla, T. 1997. Keila Stage. In Geology and Mineral Resources of Estonia (Raukas, A. & Teedumäe, A., eds), pp. 74–76. Estonian Academy Publishers, Tallinn.

Jin, J., Zhan, R. Copper, P. & Caldwell, W. G. E. 2007. Epipunctae and phosphatized setae in Late Ordovician plaesiomyid brachiopods from Anticosti Island, Eastern Canada. Journal of Paleontology, 81, 666–683.
doi:10.1666/pleo0022-3360(2007)081[0666:EAPSIL]2.0.CO;2

Männil, R. 1950. Materjale Viru ja Harju seeria piirilademete (D_I–E) stratigraafiast [Materials on the Stratigraphy of the Boundary Stages (D_I–E) between the Viru and Harju Series]. Manuscript, Institute of Geology, Tallinn, 286 pp. [in Estonian].

Nõlvak, J. 1997. Ordovician. Introduction. In Geology and Mineral Resources of Estonia (Raukas, A. & Teedumäe, A., eds), pp. 52, 54–55. Estonian Academy Publishers, Tallinn.

Nõlvak, J., Hints, O., Männik, P. & Pärnaste, H. 2007. Ordovician time scale in Estonia. Acta Palaeontologica Sinica, 46 (Suppl.), 351–356.

Põlma, L., Sarv, L. & Hints, L. 1988. Litologiya i fauna tipovykh razrezov Karadokskogo yarusa v Severnoj Éstonii [Lithology and Fauna of the Type Sections of the Caradoc Series in Northern Estonia]. Valgus, Tallinn, 101 pp. [in Russian, with English summary].

Schuchert, C. & Cooper, G. A. 1931. Synopsis of the brachiopod genera of the suborders Orthoidea and Pentameroidea, with notes on the Telotremata. American Journal of Science (series 5), 22, 241–255.

Williams, A. 1962. The Barr and Lowe Ardmillian Series (Caradoc) of the Girvan District, South-West Ayrshire, with descriptions of the Brachiopoda. Geological Society of London. Memoir, 3, 1–267, Pls VI–XXY.

Williams, A. & Brunton, C. H. C. 1997. Morphological and anatomical terms applied to brachiopods. In Treatise on Invertebrate Paleontology, Part H: Brachiopoda, Vol. 1: Revised (Kaesler, R. L., ed.), pp. 423–440. Geological Society of America and University of Kansas Press;Boulder, Colorado, and Lawrence, Kansas.

Wright, A. D. 1981 The external surface of Dictyonella and other pitted brachiopods. Palaeontology, 24, 443–481.

Zhan, R. & Jin, J. 2005. Brachiopods from the Middle Ordovician Shihtzupu Formation of Yunnan Province, China. Acta Palaeontologica Polonica, 50, 365–393.

Zuykov, A. M. & Butts, S. H. 2008. Glyptorthis (Foerste, 1914) and Bassettella new genus (Brachiopoda: Orthida) from the Late Ordovician of the East Baltic. Journal of Paleontology, 82, 197–200.
doi:10.1666/06-068.1

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