A long linear impression runs along the "back" of the body looking something like a chordate notochord. Cathaymyrus is related to Pikaia, another cephalochordate from the Burgess Shale.
Along the back of the body, there is a long, straight line that looks like a chordate notochord. Cathaymyrus is connected to Pikaia, another cephalochordate found in the Burgess Shale.