| Megalomma coloratum (Chamberlin, 1919) |
| Megalomma heterops Perkins, 1984 |
| Megalomma lobiferum (Ehlers, 1887) |
| Megalomma pacifici (Grube & Örsted, 1859) |
| Megalomma perkinsi Tovar-Hernández & Salazar-Vallejo, 2006 |
| Megalomma pigmentum Reish, 1963 |
| Megalomma quadrioculatum (Willey, 1905) |
| Megalomma vesiculosum (Montagu, 1815) |
| Metachone Bush, 1905 |
| Metachone mollis Bush, 1905 |
| Metalaonome Bush, 1905 |
| Metalaonome brunnea Treadwell, 1917 |
| Myxicola Renier, 1847 |
| Myxicola infundibulum (Renier, 1847) |
| Notaulax Tauber, 1879 |
| Notaulax bahamensis Perkins, 1984 |
| Notaulax californica (Treadwell, 1906) |
| Notaulax circumspiciens (Ehlers, 1887) |
| Notaulax midoculi (Hoagland, 1919) |
| Notaulax nigroincrustata Tovar-Hernández, García-Garza & de León-González, 2020 |