Family Bullinidae Lamarck 1801 (snail)
Parent taxon: Opisthobranchia according to G. Rosenberg et al. 2006
Sister taxa: Acanthotrophia, Acochlidea, Anaspidea, Buscotypus, Canepina, Cephalaspida, Cephalaspidea, Cylindrobullinoidea, Echininus, Floribella, Gymnosomata, Heteroptygmatis, Heterostrophia, Kotakaia, Lutima, Mariottia, Mistostigma, Nicosiaella, Notaspidea, Nudibranchia, Pseudofusia, Reticulacella, Rhodopemorpha, Sacoglossa, Scorbinidola, Tectibranchiata, Thecosomata, Umbraculomorpha
Subtaxa: Parvulactaeon, Sulcoactaeon
Ecology: epifaunal