uberon

(...) at some stage of its development, every chordate exhibits five uniquely derived characters or synapomorphies of the group: (...) (4) a single, tubular nerve cord that is located dorsal to the notochord (...).[well established][VHOG]

UBERON:0003076

• spinal cord
• presumptive hindbrain

• hindbrain neural tube
• spinal cord neural tube