| Eutrigaster lineri (Righi, 1972) |
| Kaxdrilus Fragoso & Rojas, 1994 |
| Kaxdrilus parcus Fragoso & Rojas, 1994 |
| Kaxdrilus proboscithecus Fragoso & Rojas, 1994 |
| Kaxdrilus sylvicola Fragoso & Rojas, 1994 |
| Larsonidrilus Jam, 1994 |
| Larsonidrilus microscolecinus James, 1993 |
| Larsonidrilus orbiculatus James, 1993 |
| Lavellodrilus Fragoso, 1988 |
| Lavellodrilus bonampakensis Fragoso, 1991 |
| Lavellodrilus ilkus Fragoso, 1991 |
| Lavellodrilus maya Fragoso, 1988 |
| Lavellodrilus notosetosus Fragoso & Rojas, 2016 |
| Lavellodrilus parvus Fragoso, 1988 |
| Lavellodrilus riparius Fragoso, 1988 |
| Lavellodrilus sheylae Fragoso & Rojas, 2018 |
| Mayadrilus Fragoso & Rojas, 1994 |
| Mayadrilus calakmulensis Fragoso & Rojas, 1994 |
| Mayadrilus rombki Fragoso & Rojas, 1994 |
| Microscolex Rosa, 1887 |