Abstract
A superarmoured lobopodian Collinsium sp. from the Cambrian (Stage 4) Wulongqing Formation in Kunming clearly exhibits dorsal sets of sclerotized spines, suspension feeding appendages with spiniform setae, and annulated walking limbs with a terminal claw. The distinctive body configuration reinforces the remarkable appendage specialization associated with feeding and locomotion and overall morphological disparity in lobopodians during the Cambrian explosion. This finding extends the geographic and stratigraphic ranges of “Collins’ monster”-like lobopodians, and provides additional information for a better understanding of the cryptic stem-group Onychophora.
摘要
首次见于昆明地区寒武系第四阶乌龙箐组的叶足动物Collinsium sp.,代表全球‘柯林斯怪物’的第四个发现点。该化石清晰展示了成组的背刺,带刺状刚毛滤食的前附肢和具环纹末端带爪的后部步足。由此佐证因捕食和运动方式不同导致寒武纪大爆发中叶足动物附肢特化、形体分异。该发现拓展了柯林斯虫的地理分布和地质延限,为认知神秘的干群有爪类提供了新信息。
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Acknowledgments
We thank Wei Dong for assistance with fieldwork. This work was supported by the National Natural Science Foundation of China (U1402232, 41472022, 41272027), the Department of Science and Technology, Yunnan Province (2015HA045), and the Bureau of Geology and Mineral Exploration and Development, Yunnan Province (2015JJ05).
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Jiao, DG., Yang, J. & Zhang, XG. A superarmoured lobopodian from the Cambrian Stage 4 of southern China. Sci. Bull. 61, 1372–1376 (2016). https://doi.org/10.1007/s11434-016-1156-1
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DOI: https://doi.org/10.1007/s11434-016-1156-1