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5,000 year-old spermatozoa in Quaternary Ostracoda (Crustacea) |
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| Authors: | Renate Matzke-Karasz David C Horne Horst Janz Huw I Griffiths William F Hutchinson Richard C Preece |
| Institution: | Institut für Pal?ontologie und Historische Geologie, Ludwig-Maximilians-Universit?t München, Richard-Wagner-Strasse 10, 80333 Munich, Germany, 11 Mundi Crescent, Newmachar, Aberdeenshire, AB21 0LY, UK, Institut für Mineralogie, Petrologie und Geochemie, Universit?t Tübingen, Wilhelmstrasse 56, 72074 Tübingen, Germany, Department of Geography, University of Hull, Cottingham Road, Kingston-upon-Hull HU6 7RX, UK, Molecular Ecology and Fisheries Genetics Laboratory, School of Biology, University of Hull, Kingston-Upon-Hull HU6 7RX, UK, Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK, |
| Abstract: | Fossil spermatozoa are recorded for the first time in freshwater ostracods (small bivalved crustaceans) from Holocene sediments at sites in the United Kingdom and Germany. Exceptional conditions at these sites have resulted in the preservation of chitinous "soft parts", including limbs, the remains of Zenker's Organs (sperm pumps that are part of the male reproductive apparatus in cypridoidean ostracods) and spermatozoa from eight different species. Comparisons are made with spermatozoa from living ostracods and the implications of these discoveries for evolutionary studies of reproductive modes are discussed. |
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