| curacao | | melampus coffeus | species | 2 | 0 |
| mauritius | | melampus luteus | species | 1 | 0 |
| panama | panama province | melampus carolianus | species | 7 | 0 |
| united states | | melampus floridanus | species | 2 | 0 |
| united states | california | melampus olivaceus | species | 2 | 0 |
| united states | florida | melampus bidentatus cryptic species 'gulf' | species | 4 | 0 |
| united states | florida | melampus bullaoides | species | 2 | 0 |
| united states | florida | melampus coffeus | species | 2 | 0 |
| united states | florida | melampus monile | species | 2 | 0 |
| united states | georgia | melampus bidentatus | species | 62 | 0 |
| united states | louisiana | melampus bidentatus cryptic species 'south' | species | 2 | 0 |
| united states | maryland | melampus bidentatus | species | 14 | 0 |
| united states | massachusetts | melampus bidentatus cryptic species 'north' | species | 2 | 0 |
| united states | new york | melampus bidentatus | species | 2 | 0 |
| united states | texas | melampus bidentatus cryptic species 'gulf' | species | 2 | 0 |
| united states | virginia | melampus bidentatus | species | 3 | 0 |
| united states | virginia | melampus bidentatus cryptic species 'north' | species | 2 | 0 |
| united states | virginia | melampus bidentatus cryptic species 'south' | species | 2 | 0 |