[3] The fossils of these synapsids were first discovered in the Molotov Province region of Russia in limestone beds with a high content of copper.

However, scientists believe that these organisms likely come from higher rock beds due to increased specializations in their morphology.

They lack the ‘expansion of supraorbital bones over the orbits, which would act as a stress sink’ in certain hypercarniverous species such as thalattosuchian Dakosaurus.

Syodon is characterized by possessing "bulbous" post-canines featuring significant wear facets in adults, whereas juveniles tend to have ‘bladelike’ post canines.

Syodon also feature a set of smaller, replacement teeth out-of-place from the main palatine tooth row.