[2] Cedaria has an ovate outline of 1 centimetre or 0.39 inches long on average (maximum size 2.5 cm) and ¾ as wide between the tips of the genal spines.

The headshield (or cephalon) is parabolic in shape with a well defined wide, and typically darker colored border of about 10% of the glabellar length or equal to a thorax segment.

The well-defined central raised area (or glabella) tapers slightly forward with a rounded front, but lateral furrows are weakly defined.

The fracture lines (or sutures) that in moulting separate the librigenae from the fixigenae are divergent just in front of the eyes, becoming parallel near the border furrow and slightly convergent at margin.

The tailshield (or pygidium) is semicircular, straight or almost indented and has a long, low, tapering axis with 5 or 6 rings, and 4 or 5 pleural furrows.