Zeng et al.—Radiodontan oral cone from Guanshan Lagerstätte
possible evolutionary pathways. Current radiodontan phylo- geny is far from robust and would be improved by discoveries of other body parts associated with the frontal appendages.
Acknowledgments
J.-B. Caron and D. Erwin kindly facilitated access to the Burgess Shale collection at the ROM and USNM, respectively. Appreciation goes to Prof. J. Jin, Prof. Z. Zhang, and two anonymous reviewers for their most valuable comments and criticisms. This work was supported by the National Basic Research Programme of China (2013CB835006); the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (XDB18000000); the National Natural Science Foundation of China (41472012); and the State Scholarship Fund from the China Scholarship Council.
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