Didymograptellus kremastus n. sp., a new name for the Chewtonian (mid-Floian, Lower Ordovician) graptolite D. protobifidus sensu Benson & Keble, 1935, non Elles, 1933

References

• Benson, W.N. & Keble, R.A., 1935. The geology of regions adjacent to preservation and Chalky Inlets, Fiordland, New Zealand. Part IV. Stratigraphy and palaeontology of the fossiliferous Ordovician rocks. Transactions of the Royal Society of New Zealand 65, 244–294.
   Google Scholar
• Berry, W.B.N., 1960. Graptolite faunas of the Marathon Region, West Texas. University of Texas Publication 6005, 179 pp., 20 pls.
   Google Scholar
• Berry, W.B.N., 1962. Didymograptus bifidus (J. Hall)—its lectotype, description and occurrence. Journal of Paleontology 36, 294–299.
   Web of Science ®Google Scholar
• Carter, C. & Churkin, M.M., 1977. Ordovician and Silurian graptolite succession in the Trail Creek area, central Idaho—a graptolite zone reference section. Professional Paper of the U.S. Geological Survey 1020, Washington, 37 pp., 7 pls.
   Google Scholar
• Cooper, R.A., 1979. Ordovician geology and graptolite faunas of the Aorangi Mine area, north-west Nelson, New Zealand. New Zealand Geological Survey Paleontological Bulletin 47, 127 pp., 16 pls.
   Google Scholar
• Cooper, R.A. & Fortey, R.A., 1982. The Ordovician graptolites of Spitsbergen. Bulletin of the British Museum (Natural History), Geology 36, 157–302.
   Google Scholar
• Elles, G.L., 1933. The Lower Ordovician graptolite faunas with special reference to the Skiddaw Slates. Summary of Progress of the Geological Survey, London 1932, 94–111.
   Google Scholar
• Elles, G.L. & Wood, E.M.R., 1901. A Monograph of British Graptolites. Part I Dichograptidae. Monograph of the Palaeontographical Society of London 55, 1–54, pls 1–4.
   Google Scholar
• Fortey, R.A., 1976. Correlation of shelly and graptolitic early Ordovician successions, based on the sequence in Spitsbergen. In The Ordovician System. Bassett, M.G., ed, Palaeontological Association Symposium Proceedings. University of Wales Press, Cardiff, 263–280.
   Google Scholar
• Hall, J., 1865. Graptolites of the Quebec Group. In Figures and Descriptions of Canadian Organic Remains, Decade 2, 151 pp., pls. A, B, 1–21. Canadian Geological Survey.
   Google Scholar
• Hall, T.S., 1914. Victorian Graptolites. Part IV. Some new or little-known species. Proceedings of the Royal Society of Victoria 27, 104–118.
   Google Scholar
• Harris, W.J. & Keble, R.A., 1932. Victorian graptolite zones, with correlations and description of species. Proceedings of the Royal Society of Victoria 44, 25–48.
   Google Scholar
• Harris, W.J. & Thomas, D.E., 1938. A revised classification and correlation of the Ordovician graptolite sequence zones of Victoria. Mining and Geological Journal 1(3), 62–72.
   Google Scholar
• Lapworth, C., 1873. On an improved classification of the Rhabdophora. Geological Magazine 10, 555–560.10.1017/S0016756800469372
   Google Scholar
• Legg, D.P., 1976. Ordovician trilobites and graptolites from the Canning Basin, Western Australia. Geologica et Palaeontologica 10, 1–58.
   Google Scholar
• Mu, A.T., 1974. Evolution, classification and distribution of graptoloidea and graptodendroids. Scientia Sinica 17, 227–238.
   Google Scholar
• Mu, E., Li, J., Ke, M., Lin, Y. & Ni, Y., 2002. Fossil Graptolites of China. Science Press, Beijing, 1025 pp., 256 pl. (in Chinese)
   Google Scholar
• Ripper, E.A., 1937. A note on the occurrence of Didymograptus protobifidus Elles in the Lower Ordovician of Victoria. Proceedings of the Royal Society of Victoria 49, 153–164.
   Google Scholar
• Ross, R.J. Jr & Berry, W.B.N., 1963. Ordovician graptolites of the Basin Ranges in California, Nevada, Utah and Idaho. Bulletin of the Geological Survey 1134, Washington, 177 pp., 13 pls.
   Google Scholar
• Rushton, A., 2000. Didymograptus (Didymograptus?) protobifidus Elles. In Atlas of graptolite type specimens Folio 1. Zalasiewicz, J.A., Rushton, A.W.A., Hutt, J.E. & Howe, M.P.A., eds., The Palaeontographical Society & BIGG, Berkshire, 1.28.
   Google Scholar
• Thomas, D.E., 1960. The zonal distribution of Australian graptolites. Journal and Proceedings of the Royal Society of New South Wales 9, 1–58.
   Google Scholar
• VandenBerg, A.H.M. & Cooper, R.A., 1992. The Ordovician graptolite sequence of Australasia. Alcheringa 16, 33–85.10.1080/03115519208619032
   Web of Science ®Google Scholar
• Williams, S.H. & Stevens, R.K. 1988. Early Ordovician (Arenig) graptolites of the Cow Head Group, western Newfoundland, Canada. Palaeontographica Canadiana 5, 167, 34 pls.
   Google Scholar
• Zalasiewicz, J.A., Taylor, L., Rushton, A.W.A., Loydell, D.K., Rickards, R.B. & Williams, M., 2009. Graptolites in British stratigraphy. Geological Magazine 146, 785–850.10.1017/S0016756809990434
   Web of Science ®Google Scholar