| Issue |
BSGF - Earth Sci. Bull.
Volume 191, 2020
Special Issue Paleontology
|
|
|---|---|---|
| Article Number | 32 | |
| Number of page(s) | 10 | |
| DOI | https://doi.org/10.1051/bsgf/2020012 | |
| Published online | 04 November 2020 | |
Regular Article
Cosmopolitan myodocope ostracods from the Silurian of Uzbekistan, Central Asia
Les ostracodes myodocopes cosmopolites du silurien Asie centrale
1
Department of Historical and Dynamic Geology, Saint Petersburg Mining University,
Saint Petersburg, Russia
2
Univ Lyon, Univ Lyon 1, ENSL, CNRS, LGL-TPE,
F-69622
Villeurbanne, France
3
School of Geography, Geology and the Environment, University of Leicester,
Leicester LE1 7RH, UK
4
Regional Geological Survey Expedition,
Tashkent Region, Uzbekistan
* Corresponding author: vincent.perrier@univ-lyon1.fr
Received:
13
November
2019
Accepted:
21
April
2020
Four species of myodocope ostracod are documented from the Silurian Ludlow Series of the Aburtkan gorge on the southern slope of Dzhalpak Mountain, Uzbekistan: namely, Parabolbozoe bohemica (Barrande, 1872), Bolbozoe anomala Barrande, 1872, Silurocypridina calva Perrier, Vannier and Siveter, 2011 and Richteria migrans (Barrande, 1872). These species have a palaeogeographically widespread trans-oceanic distribution, which supports the notion that Silurian myodocopes signify the earliest zooplanktonic ostracods. Richteria migrans (Barrande, 1872), in particular, provides a precise intercontinental biostratigraphic marker that identifies rocks of the upper Gorstian to upper Ludfordian stages.
Résumé
Quatre espèces d’ostracodes myodocopes sont documentées dans le Silurien (Ludlow) des gorges d’Aburtkan sur le versant sud de la montagne Dzhalpak en Ouzbékistan : Parabolbozoe bohemica (Barrande, 1872), Bolbozoe anomala Barrande, 1872, Silurocypridina calva Perrier, Vannier et Siveter, 2011, and Richteria migrans (Barrande, 1872). Ces espèces ont une distribution paléogéographique trans-océanique durant le Silurien. Cette distribution cosmopolite soutient l’idée que les myodocopes siluriens représentent la première faune d’ostracodes zooplanctoniques. Richteria migrans (Barrande, 1872), en particulier, est un marqueur biostratigraphique intercontinental précis qui permet de dater les roches du Gorstien supérieur au Ludfordien supérieur.
Key words: Ludlow Series / Myodocopa / Ostracoda / palaeobiogeography / plankton / Silurian
Mots clés : Ludlow / Myodocopa / Ostracoda / paléobiogéographie / plancton / Silurien
© E. Mikhailova et al., Published by EDP Sciences 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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