| argentina | | megalobulimus abbreviatus | species | 29 | 0 |
| argentina | | megalobulimus oblongus lorentzianus | subspecies | 97 | 0 |
| argentina | | megalobulimus oblongus musculus | subspecies | 12 | 0 |
| argentina | | megalobulimus sanctipauli | species | 19 | 0 |
| brazil | bahia | megalobulimus oblongus | species | 1 | 0 |
| brazil | sao paulo | megalobulimus parafragilior | species | 1 | 0 |