| Nominal Species (n = 17) | Present allocation (n = 12) | Ref. |
|---|---|---|
| Modulus angulata Adams, 1845 | Modulus carchedonius | 75097 |
| Modulus bayeri Petuch, 2001 | Modulus bayeri | 83435 |
| Modulus bermontianus Petuch, 1994 | Modulus bermontianus | 83435 |
| Modulus calusa Petuch, 1988 | Modulus calusa | 19 |
| Modulus candidus Petit de la Saussaye, 1853 | Indomodulus tectum | 3477 |
| Monodonta carchedonius Lamarck, 1822 | Modulus carchedonius | 83435 |
| Modulus disculus Philippi, 1846 | Modulus disculus | 19 |
| Modulus dorsuosus Gould, 1853 | Modulus disculus | 75097 |
| Modulus floridanus Conrad, 1869 | Modulus floridanus | 19 |
| Modulus kaicherae Petuch, 1987 | Modulus kaicherae | 19 |
| Modulus lindae Petuch, 1987 | Modulus lindae | 19 |
| Trochus modulus Linnaeus, 1758 | Modulus modulus | 83435 |
| Modulus nodosus Macsotay & Campos, 2001 | Modulus nodosus | 83435 |
| Modulus pacei Petuch, 1987 | Modulus pacei | 19 |
| Modulus perlatus Gmelin, 1791 | Modulus modulus | 75097 |
| Modulus pisum Morch, 1876 | Modulus modulus | 75097 |
| Modulus tasmanica Tension-woods, 1877 | Modulus modulus | 75097 |