A primitive sarcopterygian fish with an eyestalk (original) (raw)
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- Published: 01 March 2001
Nature volume 410, pages 81–84 (2001)Cite this article
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Abstract
The discovery of two Early Devonian osteichthyan (bony fish) fossils1,2,3,4 has challenged established ideas about the origin of osteichthyans and their divergence into actinopterygians (teleosts and their relatives) and sarcopterygians (tetrapods, coelacanths, lungfishes and related groups)5,6,7. Psarolepis from China1,2,8,9 and an unnamed braincase from Australia3 combine derived sarcopterygian and actinopterygian characters with primitive features previously restricted to non-osteichthyans, suggesting that early osteichthyan evolution may have involved substantial parallellism between sarcopterygians and actinopterygians. But interpretation of these fossils has been hampered by poor phylogenetic resolution1,3. Here we describe a basal sarcopterygian fish, Achoania gen, et sp. nov., that fills the morphological gap between Psarolepis and higher sarcoptergyians. We also report the presence of eyestalk attachments in both Achoania and Psarolepis, showing that this supposedly non-osteichthyan feature occurs in basal sarcopterygians as well as the actinoptergyian-like Australian braincase3.
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Acknowledgements
We thank M. M. Chang, P. Janvier and M. I. Coates for useful discussions, U. Samuelson and Zhang Jie for photographic work, Lu Xiufen for specimen preparation and Hu Huiqing for artwork. M.Z. & X.Y. acknowledge the support from the Chinese Foundation of Natural Sciences, Ministry of Science & Technology (China), and National Geographic Society (US). X.Y. thanks Kean University for faculty research and development support.
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Authors and Affiliations
- Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing, 100044, China
Min Zhu - Department of Biological Sciences, Kean University, Union, 07083, New Jersey, USA
Xiaobo Yu - Department of Palaeontology, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK
Per E. Ahlberg
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- Min Zhu
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Zhu, M., Yu, X. & Ahlberg, P. A primitive sarcopterygian fish with an eyestalk.Nature 410, 81–84 (2001). https://doi.org/10.1038/35065078
- Received: 22 August 2000
- Accepted: 08 November 2000
- Issue Date: 01 March 2001
- DOI: https://doi.org/10.1038/35065078