| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Modulus bayeri Petuch, 2001 |
Western Atlantic | 1.8 | |
| Modulus bermontianus Petuch, 1994 |
Western Atlantic | 1 | |
| Modulus calusa Petuch, 1988 |
Western Central Atlantic | 1.5 | |
| Modulus carchedonius (Lamarck, 1822) |
Angled modulus | Western Atlantic | 1.7 |
| Modulus cerodes (Adams, 1851) |
Southeast Pacific | ||
| Modulus kaicherae Petuch, 1987 |
Western Atlantic | 1.4 | |
| Modulus lindae Petuch, 1987 |
Western Atlantic | 1 | |
| Modulus modulus (Linnaeus, 1758) |
Buttonsnail | Western Atlantic and Eastern Pacific | 1.65 |
| Modulus nodosus Macsotay & Campos, 2001 |
Western Atlantic | 2.99 | |
| Modulus pacei Petuch, 1987 |
Western Atlantic | 1.4 |