Superfamily SETHOPEROIDEA Haeckel, 1882 n. stat.

Sethoperida Haeckel, 1882: 433 [as a tribe]; 1887: 1192, 1194, 1232 [as a subfamily].

DIAGNOSIS. — Same as the family.

REMARKS

The independency of this superfamily and its relationship to other Lineage IV superfamilies has not been recognized due to the lack of molecular phylogenic data for the Sethoperidae . The complexity of the cephalis and the mono-segmentation resemble that of the Plagiacanthoidea .