Copulation in antiarch placoderms and the origin of gnathostome internal fertilization

John A. Long (), Elga Mark-Kurik, Zerina Johanson, Michael S. Y. Lee, Gavin C. Young, Zhu Min, Per E. Ahlberg, Michael Newman, Roger Jones, Jan den Blaauwen, Brian Choo and Kate Trinajstic
Additional contact information
John A. Long: School of Biological Sciences, Flinders University, 2100, Adelaide, South Australia 5001, Australia
Elga Mark-Kurik: Institute of Geology at Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
Zerina Johanson: Natural History Museum, London SW7 5BD, UK
Michael S. Y. Lee: South Australian Museum, North Terrace
Gavin C. Young: Research School of Earth Sciences, The Australian National University, Canberra, Australian Capital Territory 0200, Australia
Zhu Min: Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing 100044, China
Per E. Ahlberg: Evolutionary Biology Centre, Uppsala University, Norbyvägen 18A, 752 36 Uppsala, Sweden
Michael Newman: Vine Lodge, Vine Road, Johnston, Haverfordwest, Pembrokeshire SA62 3NZ, UK
Roger Jones: 6 Burghley Road, Wimbledon, London SW19 5BH, UK
Jan den Blaauwen: University of Amsterdam, Science Park 904, 1098XH, Amsterdam, The Netherlands
Brian Choo: School of Biological Sciences, Flinders University, 2100, Adelaide, South Australia 5001, Australia
Kate Trinajstic: Western Australian Organic and Isotope Geochemistry Centre, Curtin University

Nature, 2015, vol. 517, issue 7533, 196-199

Abstract: The discovery of claspers in fossils of antiarch placoderms, an ancient group of armoured fish, suggests that internal fertilization was the ancestral type of reproduction for all jawed vertebrates: this contrasts with the current understanding that external fertilization must be the ancestral state.

Date: 2015
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DOI: 10.1038/nature13825

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