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Lowermost Silurian graptolites from the Kurama Range, eastern Uzbekistan

Published online by Cambridge University Press:  20 May 2016

Tatjana N. Koren'  and
Michael J. Melchin
Tatjana N. Koren'
Affiliation:
All-Russia Geological Research Institute (VSEGEI), Sredny Pr. 74, 199026, St. Petersburg, Russia
Michael J. Melchin
Affiliation:
Geology Department, St. Francis Xavier University, P.O. Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
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Abstract

An unusually diverse fauna of biserial graptolites has been recovered from the Kajrak and Urubulak formations in the Kurama Range of eastern Uzbekistan. The fauna consists of 26 distinct taxa, 24 of which are systematically described and illustrated. The entire fauna can be assigned to the Akidograptus ascensus–Parakidograptus acuminatus Biozone, which is earliest Rhuddanian (early Llandovery) in age. Within this biozone, however, three regionally distinguishable subzones can be recognized, the N. lubricus, A. cuneatus and H. sinitzini subzones. New taxa described are Normalograptus larini, Normalograptus skeliphrus, “Paraclimacograptus” kiliani kuramaensis, “Glyptograptus” jerini, and “Glyptograptus” ugurensis. New combinations described are Normalograptus acceptus (Koren’ and Mikhaylova, 1980), Normalograptus bicaudatus (Chen and Lin, 1978), Normalograptus jideliensis (Koren’ and Mikhaylova, 1980), Normalograptus lubricus (Chen and Lin, 1978), Normalograptus mirnyensis (Obut and Sobolevskaya, 1967), and Sudburigraptus illustris (Koren’ and Mikhaylova, 1980).

Type
Research Article
Information
Journal of Paleontology , Volume 74 , Issue 6 , November 2000 , pp. 1093 - 1113
Copyright
Copyright © The Paleontological Society

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