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Infraorder Scutelliformes Haekel, 1896, p. 231

Diagnosis	Clypeasteroids with: lantern muscle attachment structures consisting of five fused interradial pegs; interambulacral plating biserial to apex.
Range	Early Eocene to Recent; worldwide.
Remarks	For detailed discussion of this grouping see Nisiyama (1968). Nisiyama, S. 1968. The echinoid fauna from Japan and adjacent regions, Part II. Palaeontological Society of Japan, Special Paper 13, 1-491, pls 19-30.