| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Mecynostomum auritum (Schultze, 1851) |
Northeast Atlantic and the Mediterranean | ||
| Mecynostomum cordiforme Levinsen, 1879 |
Northwest Atlantic | ||
| Mecynostomum haplovarium Dörjes, 1968 |
Northeast Atlantic | ||
| Mecynostomum lentiferum Levinsen, 1879 |
Northwest Atlantic | ||
| Mecynostomum predatum Faubel, 1976 |
Northeast Atlantic | ||
| Mecynostomum torquens Kozloff, 2000 |
Northeast Pacific |