Order Systellommatophora
Order Systellommatophora (1+ superfamilies, 1+ families, 3+ genera)
- Superfamily Onchidioidea (1+ families, 3+ genera)
- Family Onchidiidae (3+ genera)
- Genus Onchidella (4+ species)
- Onchidella celtica
- Onchidella binneyi
- Onchidella nigricans
- Onchidella patelloides
- Genus Onchidium (2+ species)
- Onchidium griseum
- Onchidium nigram
- Genus Paraonchidium
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