Kurzfassung
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.
Abstract
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.
References
Bouton, T. 1960. Catalogue of type invertebrate fossils of the Geological Survey of Canada, vol. 1. - Geological Survey of Canada, Ottawa.
Boucek, B. &Pribyl, A. 1953. Taxonomy and phylogeny of some Ordovician graptolites. - Bulletin international de l’Académie tchèque des Sciences52(20): 1–17, Prague.
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.
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.
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.
— 1865. Graptolites of the Québec group. - Geological Survey of Canada. Figures and descriptions of Canadian organic remains. Decade2: 1–151, 21 + 2 pls., Ottawa.
Hall, T. S. 1914. Victorian graptolites, part 4. Some new or little-known species. - Proceedings of the Royal Society of Victoria27: 104–118, Melbourne.
Harris, W. J. &Thomas, D. E. 1938. Victorian graptolites (New Series), part 5. - Mining and Geological Journal of Victoria1: 70–81, Melbourne.
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].
Lapworth, C. 1873. On an improved classification of the Rhabdophora. - Geological Magazine10: 500–504, 555–560, London.
Lindholm, K. 1991. Hunnebergian graptolites and biostratigraphy in southern Scandinavia. - Lund Publications in Geology95: 1–36, Lund.
Lindholm, K. &Maletz, J. 1989. Intraspecific variation and relationships of some Lower Ordovician species of the dichograptid,Clonograptus. - Palaeontology32: 711–743, pl. 83, London.
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.
- 1992a. Biostratigraphie und Paläogeographie von Unterordovizischen Graptolithenfaunen des östlichen Kanadas und Skandinaviens. -Unpublished Ph. D. thesis, Technische Universität Berlin. - 246 pp., 10 pls., Berlin.
— 1992b. The proximal development in anisograptids (Graptoloidea, Anisograptidae). - Paläontologische Zeitschrift66: 297–309, Stuttgart.
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).
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.
Monsen, A. 1937. Die Graptolithenfauna im Unteren Didymograptusschiefer (Phyllograptusschiefer) Norwegens. - Norsk Geologisk Tidsskrift16: 57–266, pls. 1–20, Oslo.
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.
Rickards, B. &Chapman, A. 1991. Bendigonian graptolites (Hemichordata) of Victoria. - Memoirs of the Museum of Victoria52: 1–135, Melbourne.
Ruedemann, R. 1947. Graptolites of North America. - Geological Society of America Memoir19: 1–652, Albany.
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.
Tullberg, S. A. 1880. NågraDidymograptus-arter i undre graptolitskiffer vid Kiviks-Esperöd. - Geologiska Föreningens i Stockholm Förhandlingar5: 39–43, pl. 2, Stockholm.
Tzaj, D. T. 1974. Lower Ordovician graptolites of Kazakhstan. - 127 pp., Moscow (USSR Academy of Science). [In Russian].
Williams, S. H. &Stevens, R. K. 1988. Early Ordovician (Arenig) graptolites of the Cow Head Group, western Newfoundland, Canada. - Palaeontographica Canadiana5: 1–167, Toronto.
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].
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Maletz, J. The identity ofDidymograptus (Expansograptus) suecicus (Tullberg) and related species (Graptoloidea, Dichograptidae). Paläont. Z. 70, 203–212 (1996). https://doi.org/10.1007/BF02988278
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DOI: https://doi.org/10.1007/BF02988278