Exceptionally preserved ostracodes from a Middle Miocene palaeolake, California, USA

Wilkinson, I.P. and Wilby, P.R. and Williams, M. and Siveter, D.J. and Page, A. A. and Leggitt, L. and Riley, D.A. (2010) Exceptionally preserved ostracodes from a Middle Miocene palaeolake, California, USA. Journal of the Geological Society, 167 (4). pp. 817-825. DOI https://doi.org/10.1144/0016-76492009-178

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Exceptionally well-preserved specimens of a new cypridid ostracode (Crustacea), Raepula ira sp. nov., are described from palaeolake sediments of the Middle Miocene Barstow Formation of the Mud Hills, southern California. This is only the second occurrence of exceptionally preserved ostracodes from the Miocene. Based on ages obtained from associated volcanic tuffs the palaeolake sediments were deposited between 16.3 and 15.8 Ma. The ostracodes form one element of a diverse lake community dominated by fairy shrimps, copepods, diatoms, larvae of diving beetles, flies and mosquitoes, and body fossils and ephippia of branchiopods and anomopods. The ostracodes are preserved three dimensionally with their soft anatomy replicated in microcrystalline silica. Submicron-scale details such as sensory setae are preserved, surpassing the resolution of most other ostracode-bearing lagerstatten and allowing their biology to be compared with extant taxa. Supplementary materialRed-blue anaglyphs of the exceptionally preserved ostracodes are available at http://www.geolsoc.org.uk/SUP18407.

Item Type: Article
Uncontrolled Keywords: 2010AREP; IA60;
Subjects: 04 - Palaeobiology
Divisions: 04 - Palaeobiology
Journal or Publication Title: Journal of the Geological Society
Volume: 167
Page Range: pp. 817-825
Identification Number: https://doi.org/10.1144/0016-76492009-178
Depositing User: Sarah Humbert
Date Deposited: 12 Mar 2011 11:29
Last Modified: 23 Jul 2013 10:02
URI: http://eprints.esc.cam.ac.uk/id/eprint/2029

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