The Snails & Slugs (Gastropoda) - class
(Prosobranchia) - subclass
(Bellerophontinaka) - order -extinct-

()
- family

()
- family

()
- family

()
- family
(Eogastropoda) - subclass
(Patellogastropoda) - order

(Patelloidea)
- superfamily

(Nacelloidea)
- superfamily

(Lottioidea)
- superfamily

(Neolepetopsoidea)
- superfamily
(Euomphalina) - order

(Anomphaloidea)
- superfamily

(Craspidostomatoidea)
- superfamily

(Euomphaloidea)
- superfamily

(Macluritoidea)
- superfamily

(Ophiletoidea)
- superfamily

(Oriostomatoidea)
- superfamily

(Palaeotrochoidea)
- superfamily

(Platyceratoidea)
- superfamily

(Pseudophoroidea )
- superfamily
(Neomphalida) - order

(Neomphaloidea)
- family
(Mimospirina) - order

()
- family

()
- family

()
- family

()
- family
(Orthogastropoda) - subclass

(Neomphaloida)
- order

(Cocculiniformia)
- superorder

(Vetigastropoda)
- superorder

(Neritaemorphi)
- superorder

(Caenogastropoda)
- superorder

(Heterobranchia)
- superorder