Systellommatophora
| Systellommatophora | |
|---|---|
| Land slug Laevicaulis alte (Veronicelloidea) | |
| Sea slug Onchidella sp. (Onchidioidea) | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Mollusca | 
| Class: | Gastropoda | 
| Superorder: | Eupulmonata | 
| Order: | Systellommatophora | 
| Families | |
| See text | |
| Synonyms | |
| Gymnomorpha | |
The Systellommatophora (synonym Gymnomorpha) is a clade of primitive, air-breathing slugs, according to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005).
They are marine and terrestrial pulmonate gastropods within the Heterobranchia. There are two superfamilies in this clade. Slugs in the superfamily Onchidioidea are primarily marine (except for five land-dwelling or freshwater species), whereas slugs in the superfamily Veronicelloidea are primarily terrestrial.