Key Difference – Urochordata vs Cephalochordata Urochordata and Cephalochordata are subphyla of Chordata. The key difference between Urochordata and Cephalochordata is based on their notochord extension. In Urochordata, the notochord is extended towards the posterior part, forming a tail in the larval stages. In Cephalochordata, the notochord is extended to the anterior part. Phylum […]