Cathaymyrus is a genus of Early Cambrianchordate known from the Chengjiang biota in Yunnan Province, China.[4] Both species have a long segmented body with no distinctive head. The segments resemble the v-shaped muscle blocks found in cephalochordates such as Amphioxus. A long linear impression runs along the "back" of the body looking something like a chordate notochord.[citation needed]
While some authors have suggested that the genus is a cephalochordate and closely related to living lancelets, other authors have disputed this due to the poor preservation of the head region, considering its placement within Chordata uncertain.[5]
^Shu, DG., Morris, S. & Zhang, XL. A Pikaia-like chordate from the Lower Cambrian of China. Nature 384, 157–158 (1996). https://doi.org/10.1038/384157a0
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