Sacabambaspis has a misspelled name, the tail looks completely wrong too, hemicyclaspis and zenaspis have heads too short, cephalaspis should have a longer head, lungmenshanaspis should have a bigger nostril, drepanaspis is too spiky, thelodus should have a slightly taller head and longer tail, tremataspis is too long and not wide enough, and should have more sensory organs, pteraspis is too smooth and long
