1. The surface of the oral plates adoral and oral shields is obscured by superficial, wide, flat papillae.

2. The adoral shields are curved slightly wing-like, with glassy beads embedded in the matrix.

3. The oral plates and adoral shields often have scattered granules which become more numerous in larger specimens.

4. The adoral shields are slightly wing-like, not or just separating the oral shield from the first lateral arm plate.

5. The adoral shields are slightly curved large and occupying a large portion of the jaw proximal to the oral shield.

6. The adoral shields have glassy concretions embedded within the matrix of the plate.

7. The adoral and oral shields and the arm plates are textured with glassy granules embedded in the matrix of the plate.

8. The adoral shields are small wing-like almost separating the oral shield from the first lateral arm plate.

9. It is separated from the first lateral arm plate by the wing-like adoral shields.

10. Scattered granules are often present on the jaw plates and on parts of the adoral shields.