 The headshield extends posteriorly to form a long abdominal division which probably reached the anal region.The dorsal portion of its head armor differs from osteostracans in that the orbits of the eyes are set apart from each other, and that the shield has no pineal foramen (the "hole" between the eyes of "Cephalaspis" and its relatives), and that an opening at the base of the rostrum gives very little hints about the nature of the nasal openings.The exoskeleton is ornamented with tiny rounded tubercles.