Deep water vetulicolians from the lower Cambrian of China 1Yunnan Key Laboratory for Palaeobiology, Institute of Palaeontology, Yunnan University, Kunming, China 2MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment, Yunnan University, Kunming, China 3The Harold Hamm School of Geology and Geological Engineering, University of North Dakota, Grand Forks, North Dakota, United States 4Geosciences, State Museum of Natural History Karlsruhe, Karlsruhe, Germany 5Department of...