The identity ofDidymograptus (Expansograptus) suecicus (Tullberg) and related species (Graptoloidea, Dichograptidae)

  • Jörg Maletz


The horizontal didymograptid speciesDidymograptus (Expansograptus) suecicus Tullberg,D. (E.) holmi Törnquist andD. (E.) similis (J. Hall) are redescribed using the type material and additional specimens. Their exact proximal structures are revealed for the first time from relief material. All three species can easily be differentiated taxonomically and also show differences in their biostratigrapnic distribution.


Shale Ordovician Proximal Development Proximal Structure Stipe Length 
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Die horizontalen DidymograptenDidymograptus (Expansograptus) suecicus Tullberg,D. (E.) holmi Törnquist undD. (E.) similis (J. Hall) werden nach dem Typenmaterial und zusätzlichen Exemplaren neu beschrieben. Die Arten lassen sich durch ihre Proximalstrukturen differenzieren und zeigen eine unterschiedliche biostratigraphische Verbreitung.


  1. Bouton, T. 1960. Catalogue of type invertebrate fossils of the Geological Survey of Canada, vol. 1. - Geological Survey of Canada, Ottawa.Google Scholar
  2. Boucek, B. &Pribyl, A. 1953. Taxonomy and phylogeny of some Ordovician graptolites. - Bulletin international de l’Académie tchèque des Sciences52(20): 1–17, Prague.Google Scholar
  3. Cooper, R. A. &Fortey, R. A. 1982. The Ordovician graptolites of Spitsbergen. - Bulletin of the British Museum (Natural History), Geology Series36: 157–302, pls. 1–6, London.Google Scholar
  4. Erdtmann, B.-D. 1965. Outline stratigraphy of graptolite bearing 3b (Lower Ordovician) strata in the Oslo Region, Norway. Investigations of a section at Töyen, Oslo. - Norsk Geologisk Tidsskrift45: 481–547, Bergen.Google Scholar
  5. Hall, J. 1858. Note upon the genusGraptolithus, and descriptions of some remarkable new forms from the shales of the Hudson River Group, discovered in the investigations of the Geological Survey of Canada, under the direction of Sir W. E. Logan, F.R.S. - Canadian Naturalist and Geologist3: 139–150, 161–177, Ottawa.Google Scholar
  6. — 1865. Graptolites of the Québec group. - Geological Survey of Canada. Figures and descriptions of Canadian organic remains. Decade2: 1–151, 21 + 2 pls., Ottawa.Google Scholar
  7. Hall, T. S. 1914. Victorian graptolites, part 4. Some new or little-known species. - Proceedings of the Royal Society of Victoria27: 104–118, Melbourne.Google Scholar
  8. Harris, W. J. &Thomas, D. E. 1938. Victorian graptolites (New Series), part 5. - Mining and Geological Journal of Victoria1: 70–81, Melbourne.Google Scholar
  9. Kaljo, D. 1974. On graptolite zones of Tremadoc and Arenig of Pribaltic and Moscow syneclises. - [In:]Obut, A. M. (ed.) Graptolites of the USSR: 31–36. Novosibirsk (Publishing House “Nauka”, Siberian Branch). [In Russian].Google Scholar
  10. Lapworth, C. 1873. On an improved classification of the Rhabdophora. - Geological Magazine10: 500–504, 555–560, London.Google Scholar
  11. Lindholm, K. 1991. Hunnebergian graptolites and biostratigraphy in southern Scandinavia. - Lund Publications in Geology95: 1–36, Lund.Google Scholar
  12. Lindholm, K. &Maletz, J. 1989. Intraspecific variation and relationships of some Lower Ordovician species of the dichograptid,Clonograptus. - Palaeontology32: 711–743, pl. 83, London.Google Scholar
  13. Maletz, J. 1987. Biostratigraphie und Graptolithenfauna im Unteren Ordovizium des Hunneberges in Västergötland (Westliches Zentralschweden). - Diplomarbeit, Institut und Museum für Geologie und Paläontologie, Georg-August-Universität Göttingen.- 174 pp., 5 pls., 9 sections, Göttingen.Google Scholar
  14. - 1992a. Biostratigraphie und Paläogeographie von Unterordovizischen Graptolithenfaunen des östlichen Kanadas und Skandinaviens. -Unpublished Ph. D. thesis, Technische Universität Berlin. - 246 pp., 10 pls., Berlin.Google Scholar
  15. — 1992b. The proximal development in anisograptids (Graptoloidea, Anisograptidae). - Paläontologische Zeitschrift66: 297–309, Stuttgart.Google Scholar
  16. Maletz, J. 1994. Pendent didymograptids (Graptoloidea, Dichograptacea). - [In:]Chen Xu;Erdtmann, B.-D. &Ni Yu-nan (eds.) Graptolite research today: 37–43, Nanjing (Nanjing University Press).Google Scholar
  17. Maletz, J.;Rushton, A. W. A. &Lindholm, K. 1991. A new early Ordovician didymograptid, and its bearing on the correlation of the Skiddaw Group of England with the Tøyen Shale of Scandinavia. - Geological Magazine:128: 335–343, London.CrossRefGoogle Scholar
  18. Monsen, A. 1937. Die Graptolithenfauna im Unteren Didymograptusschiefer (Phyllograptusschiefer) Norwegens. - Norsk Geologisk Tidsskrift16: 57–266, pls. 1–20, Oslo.Google Scholar
  19. Owen, A. W.;Bruton, D. L.;Bockelie, J. F. &Bockelie, T. G. 1990. The Ordovician successions of the Oslo region, Norway. - Norges geologiske Undersøgelse Special Publikation4: 1–54, Trondheim.Google Scholar
  20. Rickards, B. &Chapman, A. 1991. Bendigonian graptolites (Hemichordata) of Victoria. - Memoirs of the Museum of Victoria52: 1–135, Melbourne.Google Scholar
  21. Ruedemann, R. 1947. Graptolites of North America. - Geological Society of America Memoir19: 1–652, Albany.Google Scholar
  22. Törnquist, S.L. 1901. Researches into the graptolites of the lower zones of the Scanian and Vestrogothian Phyllo-Tetragraptus beds. Part 1. - Lunds Universitets Årsskrift37(2:5): 1–25, 3 pls., Lund.Google Scholar
  23. Tullberg, S. A. 1880. NågraDidymograptus-arter i undre graptolitskiffer vid Kiviks-Esperöd. - Geologiska Föreningens i Stockholm Förhandlingar5: 39–43, pl. 2, Stockholm.Google Scholar
  24. Tzaj, D. T. 1974. Lower Ordovician graptolites of Kazakhstan. - 127 pp., Moscow (USSR Academy of Science). [In Russian].Google Scholar
  25. Williams, S. H. &Stevens, R. K. 1988. Early Ordovician (Arenig) graptolites of the Cow Head Group, western Newfoundland, Canada. - Palaeontographica Canadiana5: 1–167, Toronto.Google Scholar
  26. Zima, M. B. 1974. Ordovician graptolite complexes of the north Kirghizia. [In:]Obut, A. M. (ed.) Graptolites of the USSR: 36–40, Novosibirsk (Publishing House “Nauka”, Siberian Branch). [In Russian].Google Scholar

Copyright information

© E. Schweizerbart’sche Verlagsbuchhandlung 1996

Authors and Affiliations

  • Jörg Maletz
    • 1
  1. 1.Institut für Geologie und PaläontologieErnst-Moritz-Arndt Universität GreifswaldGreifswald

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