| Ectyonopsis Carter, 1883 |
| Ectyonopsis sigmata Aguilar-Camacho & Carballo, 2012 |
| Myxilla Schmidt, 1862 |
| Myxilla (Ectyomyxilla) Hentschel, 1914 |
| Myxilla (Ectyomyxilla) mariana Ridley & Dendy, 1886 |
| Myxilla (Myxilla) Schmidt, 1862 |
| Myxilla (Myxilla) incrustans (Johnston, 1842) |
| Myxilla (Myxilla) mexicensis Dickinson, 1945 |
| Myxillidae Topsent, 1928 |
| Plocamiancora Topsent, 1927 |
| Plocamiancora igzo (de Laubenfels, 1930) |