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Shankouclava
| Shankouclava Temporal range: Cambrian Stage 3,
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| Restoration of S. anningense. | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Subphylum: | Tunicata |
| Genus: | †Shankouclava Chen et al., 2003 |
| Type species | |
| †Shankouclava anningense Chen et al., 2003
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| Species | |
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Shankouclava is an extinct genus of tunicates. It is one of two[2][3] candidates for the oldest member of this group, dating to 518 million years ago. It has been found in the Lower Cambrian Maotianshan Shale at Shankou village, Anning, near Kunming (South China). Each of the eight specimens found and used for description were isolated, suggesting that the genus was solitary and not colonial.[4]
- ^ Yang, C.; Li, X.-H.; Zhu, M.; Condon, D. J.; Chen, J. (2018). "Geochronological constraint on the Cambrian Chengjiang biota, South China" (PDF). Journal of the Geological Society. 175 (4): 659–666. Bibcode:2018JGSoc.175..659Y. doi:10.1144/jgs2017-103. ISSN 0016-7649. S2CID 135091168.
- ^ Janvier, Philippe (April 23, 2015). "Facts and fancies about early fossil chordates and vertebrates". Nature. 520: 483–89. doi:10.1038/nature14437.
- ^ Northcutt, R. Glenn (June 26, 2012). "Evolution of centralized nervous systems: Two schools of evolutionary thought". Proceedings of the National Academy of Sciences of the United States of America. 109 (Supplement 1: In the Light of Evolution VI: Brain and Behavior): 10626–10633. JSTOR 41601648.
- ^ Chen, Jun-Yuan; Huang, Di-Ying; Peng, Qing-Qing; Chi, Hui-Mei; Wang, Xiu-Qiang; Feng, Man (2003). "The first tunicate from the Early Cambrian of South China". Proceedings of the National Academy of Sciences. 100 (14): 8314–8318. Bibcode:2003PNAS..100.8314C. doi:10.1073/pnas.1431177100. PMC 166226. PMID 12835415.
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