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

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

3.   The lateral arm plates also carry a series of long bristle-like spines, dorsal to the arm spines.

4.   The lateral arm plates on the proximal part of the arm are slightly enlarged.