In Tasmania, this subclass (or taxon of roughly equivalent rank) includes 247 species in 143 genera in 74 families (-subfamilies) in 32 superfamilies in the following orders (or taxa of roughly equivalent rank):
Lower Heterobranchia (e.g. pyramid-shells) (e.g. figure a)
Opisthobranchia – Acteonoidea (acteons)
Opisthobranchia – Aplysiomorpha (sea-hares) (e.g. figure b)
Opisthobranchia – Cephalaspidea (e.g. bubble-shells) (e.g. figures c-d)
Opisthobranchia – Cladobranchia – Aeolidida (sea-slugs) (e.g. figure e)
Opisthobranchia – Cladobranchia – Dendronotida (sea-slugs)
Opisthobranchia – Cladobranchia – Euarminida (sea-slugs)
Opisthobranchia – Cladobranchia – unplaced (sea-slugs) (e.g. figure f)
Opisthobranchia – Euctenidiacea – Doridacea (sea-slugs) (e.g. figures g-h)
Opisthobranchia – Nudipleura – Pleurobranchomorpha (sea-slugs) (e.g. figure i)
Opisthobranchia – Sacoglossa – Oxynoacea (e.g. sea-slugs) (e.g. figure j)
Opisthobranchia – Sacoglossa – Placobranchacea (sea-slugs) (e.g. figure k)
Opisthobranchia – Thecosomata (sea-butterflies) (e.g. figures l-m)
Opisthobranchia – Umbraculida (umbrella-shells) (e.g. figure n)
Pulmonata – Basommatophora (air-breathers) (e.g. figures o-p)
Pulmonata – Eupulmonata (e.g. lung-limpets) (e.g. figures q-r)
Pulmonata – Eupulmonata – Systellommatophora (sea-slugs) (e.g. figure s)
