Hostname: page-component-848d4c4894-ttngx Total loading time: 0 Render date: 2024-06-01T19:22:53.832Z Has data issue: false hasContentIssue false
  • English
  • Français

A new Arenig (Ordovician) graptolite fauna from the Kerman District, east-central Iran

Published online by Cambridge University Press:  01 May 2009

R. B. Rickards ,
M. A. Hamedi  and
A. J. Wright
R. B. Rickards
Affiliation:
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK
M. A. Hamedi
Affiliation:
Department of Geology, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia
A. J. Wright
Affiliation:
Department of Geology, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia
Get access Rights & Permissions [Opens in a new window]

Abstract

A single slab of silicified silty and cross-bedded mudstone from the Katkoyeh Formation, east-central Iran yields Yutagraptus cf. mantuanus Riva which indicates a late Arenig age. The slab also bears Dictyonema ghodsiae sp. nov., regarded as the only unequivocally planktonic dendroid from post-Tremadoc strata. The sicula is surrounded by at least twelve vesicular bodies which constitute a raft of floats. These are the only certain floats yet identified in the Order Dendroidea, and one of very few cases known in the Class Graptolithina.

Type
Articles
Information
Geological Magazine , Volume 131 , Issue 1 , January 1994 , pp. 35 - 42
Copyright
Copyright © Cambridge University Press 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Alavi, M. & Amidi, M. 1968. Geology of Western Parts of Takab Quadrangle. Geological Survey of Iran Geological Note no. 49 (unpublished), 94 pp.Google Scholar
Brown, I. A. & Sherrard, K. M. 1951. Graptolite zones in the Silurian of the Yass–Browning District of New South Wales. Journal & Proceedings of the Royal Society of New South Wales 85, 127–34.CrossRefGoogle Scholar
Bulman, O. M. B. 1927–1967. A Monograph of British Dendroid Graptolites. Palaeontographical Society [Monograph], 97 pp.Google Scholar
Bulman, O. M. B. & Størmer, L. 1971. Buoyancy structures in rhabdosomes of Dictyonema flabelliforme (Eich-wald). Norsk Geologisk Tidsskrift 51, 25–31.Google Scholar
Finney, S. C. 1979. Mode of life of planktonic graptolites: flotation structure in Ordovician Dicellograptus sp. Paleobiology 5, 31–9.CrossRefGoogle Scholar
Flügel, H. & Ruttner, A. 1962. Vorbericht über paläontologisch-stratigraphische Untersuchungen im Paläzoikum von Ozbak-Kuh (NE Iran). Verhandlungen der Geologischen Bundensanstalt, Wien 1, 146–50.Google Scholar
Fortey, R. A. & Cooper, R. A. 1986. A phylogenetic classification of the graptoloids. Palaeontology 29, 631–54.Google Scholar
Frech, F. 1897. Lethaea geognostica; 1, Lethaea palaeozoica, Graptolithiden (1–2 by Roemer, F.; 3 continued by Frech, F.), pp. 544–684. Stuttgart.Google Scholar
Hall, J. 1851. New genera of fossil corals. American Journal of Science 11, 398–401.Google Scholar
Hamedi, M. A. & Wright, A.J. 1992. New data on the Ordovician–Silurian of Central Iran. Abstracts, 29th International Geological Congress, Kyoto, Japan, 122.Google Scholar
Harris, W. J. & Thomas, D. E. 1941. A Silurian Dictyonema from Heathcote, Victoria. Mining and Geological Journal Sept. 1941, 306.Google Scholar
Hopkinson, J. & Lapworth, C. 1875. Descriptions of the graptolites of the Arenig and Llandeilo rocks of St David's. Quarterly Journal of the Geological Society of London 31, 631–72.CrossRefGoogle Scholar
Huckriede, R., Kürsten, M. & Venzlaff, H. 1962. Zur Geologie des Gebietes zwischen Kerman und Sagand (Iran). Beihefte zum Geologischen Jahrbuch no. 51, 197 pp.Google Scholar
Lapworth, C. 1873. On an improved classification of the Rhabdophora. Geological Magazine 10, 500–4, 555–60.CrossRefGoogle Scholar
Nicholson, H. A. 1872. Monograph of the British Graptolitidae, Blackwood & Sons, i–x, 133 pp.Google Scholar
Riva, J. 1993. Yutagraptus mantuanus n.g., n.sp., a pendent xiphograptid from the Lower Ordovician of Utah, U.S.A. In Graptolite Research Today, Proceedings of the 4th International Graptolite Working Group. Academia Silica (in press).Google Scholar
Ruedemann, R. 1947. Graptolites of North America. Memoirs of the Geological Society of America no. 19, 652 pp.Google Scholar
Ruttner, A., Nabavi, M. H. & Hajian, J. 1968. Geology of the Shirgesht area (Tabas area, East Iran). Geological Survey of Iran Report no. 4, 133 pp.Google Scholar
Setudehnia, A. O. 1972. Iran du sudouest. In Iran, pp. 285–376. Lexique Stratigraphique International, vol. 3, Asie, fasc. 9b.Google Scholar
Stöcklin, J. 1972. Iran, central, septentrional and oriental. In Iran, pp. 5–283. Lexique Stratigraphique International, vol. 3, Asie, fasc. 9b.Google Scholar
Wolfart, R. 1984. Lower Palaeozoic rocks of the Middle East. In Lower Palaeozoic of the Middle East, Eastern and Southern Africa, and Antarctica, with Essays on Lower Palaeozoic Trace Fossils of Africa and Lower Palaeozoic Palaeoclimatology (ed. Holland, C. H.), pp. 5–130. John Wiley & Sons.Google Scholar