Gabb's snail [SEP] parent taxon
Gabb's snail
Gabb's snail also known as the San Clemente Island snail, scientific name Micrarionta gabbii, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helminthoglyptidae.
This species is endemic to the United States. Its natural habitat is temperate shrubland. It is threatened by habitat loss.
Bufonaria margaritula
Bufonaria margaritula is a species of sea snail, a marine gastropod mollusk in the family Bursidae, the frog shells.
Alternative combinations: 
Bufonaria margaritula, Bursa (Bursa) margaritula, Bursa margaritula, Chasmotheca margaritula,
Parent taxon: Bufonaria (Bufonaria) according to A. G. Beu 2005
References.
- Kilburn R.N. (1972). "Taxonomic notes on South African marine Mollusca, with the description of new species and subspecies of Conus, Nassarius, Vexillum and Demoulia". Annals of the