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Biostratigraphy and taxonomy of three-dimensionally preserved nemagraptids from the Middle and Upper Ordovician of Baltoscandia

Published online by Cambridge University Press:  14 July 2015

Jaak Nõlvak  and
Daniel Goldman
Jaak Nõlvak
Affiliation:
Institute of Geology at Tallinn Technical University, Ehitajate tee 5, 19086 Tallinn, Estonia,
Daniel Goldman
Affiliation:
Department of Geology, University of Dayton, 300 College Park, Dayton, Ohio 45469,
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Abstract

Biostratigraphically significant finds of two important species of Nemagraptus in the Middle and Upper Ordovician carbonate sections of Baltoscandia are reviewed. Nemagraptus subtilis is found in the lower part of the Uhaku Regional Stage, which is correlated with the Hustedograptus teretiusculus graptolite zone. Nemagraptus gracilis is restricted to the upper part of the Kukruse Stage in the Central and South Estonian and western Latvian sections. This level correlates with the Nemagraptus gracilis graptolite Zone. the vertical distribution of these taxa is similar to, although less complete than, their ranges in the classic black shale succession in Scania, southern Sweden. the first three-dimensionally preserved specimens of N. subtilis are illustrated and described. Nemagraptus subtilis can be differentiated from N. gracilis by its lack of cladial branches, more slender stipes, shorter sicula, and upward orientation of the first two thecae.

Type
Research Article
Information
Journal of Paleontology , Volume 81 , Issue 2 , March 2007 , pp. 254 - 260
Copyright
Copyright © The Paleontological Society 

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References

Bergström, S. M. 1986. Biostratigraphic integration of Ordovician graptolite and conodont zones—a regional review, p. 61–78. In Hughes, C. P. and Rickards, R. B. (eds.), Paleoecology and Biostratigraphy of Graptolites. Geological Society Special Publication, 20.Google Scholar
Bergström, S. M., Finney, S. C., Chen, X., Pålsson, C., Wang, Z. H., and Grahn, Y. 2000. A proposed global boundary stratotype for the base of the Upper Series of the Ordovician System: The Fågelsång section, Scania, southern Sweden. Episodes, 23:102–109.Google Scholar
Berry, W. B. N. 1960. Graptolite Faunas of the Marathon Region, West Texas. The University of Texas Publication No. 6005, 179 p.Google Scholar
Bulman, O. M. B. 1936. On the graptolites prepared by Holm, Pt. VII, The graptolite fauna of the Lower Orthoceras Limestone of Hälludden, Öland, and its bearing on the evolution of the Lower Ordovician graptolites. Arkiv För Zoologi, 28A, no. 17:1–107.Google Scholar
Cooper, R. A., and Fortey, R. A. 1983. Development of the graptoloid rhabdosome. Alcheringa, 7:201–221.Google Scholar
Elles, G. L., and Wood, E. M. R. 1904. A monograph of British graptolites. Palaeontographical Society, London, 4:135–180.Google Scholar
Elles, G. L., and Wood, E. M. R. 1907. A monograph of British graptolites. Palaeontographical Society, London, 6:217–272.Google Scholar
Emmons, E. 1855. American Geology, 1, Pt. 1. Albany, New York, 194 p.Google Scholar
Finney, S. C. 1985. Nemagraptid graptolites from the Middle Ordovician Athens Shale, Alabama. Journal of Paleontology, 59:1100–1137.Google Scholar
Finney, S. C. 1986. Heterochrony, punctuated equilibrium, and graptolite zonal boundaries, p. 103–113. In Hughes, C. P. and Rickards, R. B. (eds.), Paleoecology and Biostratigraphy of Graptolites. Geological Society Special Publication, 20.Google Scholar
Finney, S. C., and Bergström, S. M. 1986. Biostratigraphy of the Ordovician Nemagraptus gracilis Zone, p. 47–59. In Hughes, C. P. and Rickards, R. B. (eds.), Paleoecology and Biostratigraphy of Graptolites. Geological Society Special Publication, 20.Google Scholar
Finney, S. C., Grubb, B. J., and Hatcher, R. D. 1996. Graphic correlation of Middle Ordovician graptolite shale, southern Appalachians: An approach for examining the subsidence and migration of the Taconic foreland basin. Geological Society of America Bulletin, 108:355–371.Google Scholar
Fortey, R. A., and Cooper, R. A. 1986. A phylogenetic classification of the graptoloids. Palaeontology, 29:631–654.Google Scholar
Grahn, Y., Nõlvak, J., and Paris, F. 1996. Precise chitinozoan dating of Ordovician impact events in Baltoscandia. Journal of Micropaleontology, 15:21–35.CrossRefGoogle Scholar
Hadding, A. 1913. Undre Dicellograptusskiffern i Skåne. Lunds Universitets Årsskrift, 9(15):1–91.Google Scholar
Hall, J. 1847. Natural History of New York, Pt. VI, Paleontology of New York, 1. Albany, New York, 338 p.Google Scholar
Hall, J. 1865. Graptolites of the Quebec Group. Figures and descriptions of Canadian organic remains. Decade 2, p. 1–151.Google Scholar
Hede, J. E. 1951. Boring through Middle Ordovician–Upper Cambrian strata in the Fågelsång district, Scania, (Sweden). Lunds Universitets Årsskrift, 46(7):1–78.Google Scholar
Hughes, R. A. 1987. Llandeilo and Caradoc graptolites of the Builth and Shelve inliers. Monograph of the Palaeontological Society, 141(577):1–89, pls. 1–5.Google Scholar
Jaanusson, V. 1960. Graptoloids from the Ontikan and Viruan (Ordovician) limestones of Estonia and Sweden. Bulletin of the Geological Institutions of the University of Uppsala, 29:289–366.Google Scholar
Lapworth, C. 1873. On an improved classification of the Rhabdopora. Geological Magazine, 10:500–504, 555–560.Google Scholar
Lapworth, C. 1875. Section Graptoloidea, p. 631–672. In Hopkinson, J. and Lapworth, C., Descriptions of the Graptolites of the Arenig and Llandeilo rocks of St. David's. Quarterly Journal of the Geological Society, London, 31.Google Scholar
Laufield, S. 1967. Caradocian chitinozoa from Dalarna, Sweden. Geologiska Föreningens i Stockholm Förhandlingar, 89:275–349.Google Scholar
Männik, P. 2001. Distribution of conodonts, p. 10–12. In Põldvere, A. (ed.), Estonian Geological Sections. Valga (10) Drill Core. Bulletin 3. Geological Survey of Estonia, Tallinn.Google Scholar
Männik, P. 2003. Distribution of Ordovician and Silurian conodonts, p. 17–23. In Põldvere, A. (ed.), Estonian Geological Sections. Ruhnu (500) Drill Core. Bulletin 5. Geological Survey of Estonia, Tallinn.Google Scholar
Männil, R. 1976. The distribution of graptoloids in the Ordovician carbonate rocks of the East Baltic area, p. 105–116. In Kaljo, D. and Koren, T. N. (eds.), Graptolites and Stratigraphy. Academy of Sciences of Estonian SSR, Institute of Geology, Tallinn. (In Russian) Google Scholar
Männil, R. 1986. Stratigraphy of kukersite-bearing deposits CIb-CIII, p. 12–22. In Puura, V. (ed.), Geology of the Kukersite-bearing Beds of the Baltic Oil Shale Basin. Academy of Sciences of Estonian SSR, Institute of Geology, Tallinn. (In Russian) Google Scholar
Mitchell, C. E. 1987. Evolution and phylogenetic classification of the Diplograptacea. Palaeontology, 30:353–405.Google Scholar
Mitchell, C. E., Maletz, J., and Yuan-dong, Zhang. 1995. Evolutionary origins of the Diplograptina, p. 401–404. In Cooper, J. D., Droser, M. L., and Finney, S. C. (eds.), Ordovician Odyssey: Short Papers for the Seventh International Symposium on the Ordovician System. The Pacific Section Society for Sedimentary Geology (SEPM), Book 77.Google Scholar
Moberg, J. C. 1896. Geologisk Vägvisare inom Fågelsångstrakten. Meddelande No. 2 från Lunds Geologiska Fältklubb, Stockholm, 36 p.Google Scholar
Nilsson, R. 1977. A boring through Middle and Upper Ordovician strata at Koängen in western Scania, southern Sweden. Sveriges Geologiska Undersökning, C733:1–58.Google Scholar
Nõlvak, J. 1997. Ordovician. Introduction, p. 52–55. In Raukas, A. and Teedumäe, A. (eds.), Geology and Mineral Resources of Estonia. Estonian Academy Publishers, Tallinn.Google Scholar
Nõlvak, J. 2002. Chitinozoan Biostratigraphy in the Ordovician of Baltoscandia. Theses on Natural and Exact Sciences B14. Tallinn Technical University Press, Tallinn, 200 p.Google Scholar
Nõlvak, J., and Grahn, Y. 1993. Ordovician chitinozoan zones from Baltoscandia. Review of Palaeobotany and Palynolology, 79:245–269.Google Scholar
Pålsson, C., Månsson, K., and Bergström, S. M. 2002. Biostratigraphic and paleoecologic significance of graptolites, trilobites, and conodonts in the Middle-Upper Ordovician Andersön Shale: An unusual “mixed” facies deposit in Jämtland, central Sweden. Transactions of the Royal Society of Edinburgh: Earth Sciences, 93:35–57.Google Scholar
Ruedemann, R. 1947. The graptolites of North America. Geological Society of America Memoir, 19, 652 p.Google Scholar
Vandenbroucke, T. 2004. Chitinozoan biostratigraphy of the Upper Ordovician Fågelsång GSSP, Scania, southern Sweden. Review of Paleobotany and Palynology, 130:217–239.Google Scholar
Webby, B. D., Cooper, R. A., Bergström, S. M., and Paris, F. 2004. Stratigraphic framework and time slices, p. 41–48. In Webby, B. D., Paris, F., Droser, M. L., and Percival, I. G. (eds.), The Great Ordovician Biodiversity Event. Columbia University Press.Google Scholar
Wicander, R., Foster, C. B., and Reed, J. D. 1996. Gloeocapsomorpha, p. 215–225. In Jansonius, J. and McGregor, D. C. (eds.), Palynology: Principles and Applications. American Association of Stratigraphic Palynologists Foundation, 1.Google Scholar
Williams, M., Rushton, A. W. A., Wood, B., Floyd, J. D., Smith, R., and Wheatley, C. 2004. A revised graptolite biostratigraphy for the lower Caradoc (Upper Ordovician) of southern Scotland. Scottish Journal of Geology, 40:97–114.Google Scholar