👉 Synodontoid is a type of toothed animal that has a single row of teeth in its jaw. Synodontids are found mainly in the Tertiary and Quaternary stages of the Cambrian period, which occurred around 540 million years ago. They have been named after the genus "synodon" (which means "double"), as they have two rows of teeth on one side and a single row on the other. Synodontids are found in a variety of environments such