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A juvenile redlichiid trilobite caught on the move: Evidence from the Cambrian (Series 2) ChengJiang Lagerstätte, southwestern China

¹ Early Life Evolution Laboratory, School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, China
² Early Life Institute and Department of Geology, Northwest University, Xi'an, 710069, China ouqiang{at}cugb.edu.cn; elidgshu{at}nwu.edu.cn

A trace fossil with its putative in situ maker, a redlichiid juvenile of Eoredlichia intermediaLu, 1940 from the lower Cambrian (Series 2) Chengjiang fauna, southwestern China, is reported here. Evidence for biogenetic linkage of the trail to the trilobite includes their close, integrated association, in situ preservation, and consistent dimensions. Analysis from Scanning Electron Microscopy further strengthens this argument. Preservation mechanism and fidelity loss in the trail are considered. In light of functional morphology, a nektonic-benthic transition in modes of life is inferred for meraspides of Eoredlichia.