Abstract
The relationship of the three living groups of sarcopterygians or lobe-finned fish (tetrapods, lungfish and coelacanths) has been a matter of debate1,2,3,4,5. Although opinions still differ, most recent phylogenies suggest that tetrapods are more closely related to lungfish than to coelacanths6,7,8,9,10. However, no previously known fossil taxon exhibits a concrete character combination approximating the condition expected in the last common ancestor of tetrapods and lungfish—and it is still poorly understood how early sarcopterygians diverged into the tetrapod lineage (Tetrapodomorpha)7 and the lungfish lineage (Dipnomorpha)7. Here we describe a fossil sarcopterygian fish, Styloichthys changae gen. et sp. nov., that possesses an eyestalk and which exhibits the character combination expected in a stem group close to the last common ancestor of tetrapods and lungfish. Styloichthys from the Lower Devonian of China bridges the morphological gap between stem-group sarcopterygians (Psarolepis and Achoania)10 and basal tetrapodomorphs/basal dipnomorphs. It provides information that will help in the study of the relationship of early sarcopterygians, and which will also help to resolve the tetrapod–lungfish divergence into a documented sequence of character acquisition.
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References
Rosen, D. E., Forey, P. L., Gardiner, B. G. & Patterson, C. Lungfishes, tetrapods, paleontology and plesiomorphy. Bull. Am. Mus. Nat. Hist. 167, 159–276 (1981)
Schultze, H.-P. Comparison of hypotheses on the relationships of sarcopterygians. Syst. Biol. 43, 155–173 (1994)
Janvier, P. Early Vertebrates (Oxford Univ. Press, Oxford, 1996)
Zardoya, R. et al. Searching for the closest living relative(s) of tetrapods through evolutionary analyses of mitochondrial and nuclear data. Mol. Biol. Evol. 15, 506–517 (1998)
Zhu, M. & Schultze, H.-P. in Major Events in Early Vertebrate Evolution (ed. Ahlberg, P. E.) 289–314 (Taylor & Francis, London, 2001)
Maisey, J. G. Head and tails: a chordate phylogeny. Cladistics 2, 201–256 (1986)
Ahlberg, P. E. A re-examination of sarcopterygian interrelationships, with special reference to the Porolepiformes. Zool. J. Linn. Soc. 103, 241–287 (1991)
Cloutier, R. & Ahlberg, P. E. in Interrelationships of Fishes (eds Stiassny, M. L., Parenti, L. R. & Johnson, G. D.) 445–480 (Academic, San Diego, 1996)
Meyer, A. Molecular evidence on the origin of tetrapods and the relationships of the coelacanth. Trends Ecol. Evol. 35, 93–101 (1995)
Zhu, M., Yu, X. & Ahlberg, P. A primitive sarcopterygian fish with an eyestalk. Nature 410, 81–84 (2001)
Yu, X. A new porolepiform-like fish, Psarolepis romeri, gen. et. sp. nov. (Sarcopterygii, Osteichthyes) from the Lower Devonian of Yunnan, China. J. Vert. Paleontol. 18, 261–274 (1998)
Zhu, M., Yu, X. & Janvier, P. A primitive fossil fish sheds light on the origin of bony fishes. Nature 397, 607–610 (1999)
Basden, A. M. & Young, G. C. A primitive actinopterygian neurocranium from the early Devonian of southeastern Australia. J. Vert. Paleontol. 21, 754–766 (2001)
Basden, A. M. et al. The most primitive osteichthyan braincase? Nature 403, 185–188 (2000)
Chang, M. M. . The Braincase of Youngolepis, a Lower Devonian Crossopterygian from Yunnan, South-western China Thesis, Stockholm Univ. (1982)
Fox, R. C. et al. A new osteolepiform fish from the Lower Carboniferous Raymond Formation, Drummond Basin, Queensland. Mem. Queensl. Mus. 38, 97–221 (1995)
Jessen, H. L. Lower Devonian Porolepiformes from the Canadian Arctic with special reference to Powichthys thorsteinssoni Jessen. Palaeontogr. A 167, 180–214 (1980)
Chang, M. M. & Zhu, M. A new Middle Devonian osteolepidid from Qujing, Yunnan. Mem. Assoc. Australas. Palaeontol. 15, 183–198 (1993)
Chang, M. M. in Early Vertebrates and Related Problems of Evolutionary Biology (eds Chang, M. M., Liu, Y. H. & Zhang, G. R.) 355–378 (Science, Beijing, 1991)
Long, J. On the relationships of Psarolepis and the onychodontiform fishes. J. Vert. Paleontol. 21, 815–820 (2001)
Swofford, D. L. PAUP: Phylogenetic Analysis Using Parsimony ver. 3.1.1 (Illinois Natural History Survey, Champaign, Illinois, 1993)
Forey, P. L. History of the Coelacanth Fishes (Chapman & Hall, London, 1998)
Cloutier, R. in Devonian Fishes and Plants of Miguasha, Quebec, Canada (eds Schultze, H.-P. & Cloutier, R.) 227–247 (Pfeil, Munich, 1996)
Gardiner, B. G. The relationships of the palaeoniscid fishes, a review based on new specimens of Mimia and Moythomasia from the Upper Devonian of Western Australia. Bull. Br. Mus. Nat. Hist. Geol. 37, 173–428 (1984)
Chang, M. M. Diabolepis and its bearing on the relationships between porolepiforms and dipnoans. Bull. Mus. Natl Hist. Nat. Ser. 4 17, 235–268 (1995)
Schultze, H.-P. in The Biology and Evolution of Lungfishes (eds Bemis, W. E., Burggren, W. W. & Kemp, N. E.) J. Morph. 1 (Suppl.), 39–74, (1987)
Ahlberg, P. E. & Johanson, Z. Osteolepiforms and the ancestry of tetrapods. Nature 395, 792–794 (1998)
Long, J. A new rhizodontiform fish from the Early Carboniferous of Victoria, Australia, with remarks on the phylogenetic position of the group. J. Vert. Paleontol. 9, 1–17 (1989)
Johanson, Z. & Ahlberg, P. E. A complete primitive rhizodont from Australia. Nature 394, 569–572 (1998)
Chang, M. M. & Yu, X. Re-examination of the relationship of Middle Devonian osteolepids—fossil characters and their interpretations. Am. Mus. Novit. 3189, 1–20 (1997)
Acknowledgements
We thank M. M. Chang and P. E. Ahlberg for advice and discussions, K. S. Thomson for comments and corrections, M. Yang for artwork, J. Zhang for photographic work, and X. Lu for specimen preparation. This work was supported by the Special Funds for Major State Basic Research Projects of China, the Chinese Foundation of Natural Sciences, and the US National Geographic Society. X.Y. thanks Kean University for faculty research and development support.
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Zhu, M., Yu, X. A primitive fish close to the common ancestor of tetrapods and lungfish. Nature 418, 767–770 (2002). https://doi.org/10.1038/nature00871
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DOI: https://doi.org/10.1038/nature00871
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