_- Archaeocidaridae
- Bothriocidaridae
- Catopygids
- Collyritidae
- Cravenechinidae
- Desorellidae
- Echinocystitidae
- Eothuriidae
- Galeropygidae
- Gitolampadids
- Glyphopneustidae
- Hemicidaridae
- Hyboclypids
- Lenticidaridae
- Lepidesthidae
- Lepidocentridae
- Orthopsidae
- Palaechinidae
- Pedinopsids
- Proterocidaridae
- Pseudodiadematidae
- Pygasteridae
- Pygaulidae
- Pygorhytidae
- Pygurids