
Diplommatinidae is a family of small land snails, also known as staircase snails, with an operculum, terrestrial gastropod mollusks in the superfamily Cyclophoroidea. The Cochlostomatinae Kobelt, 1902, were previously considered a subfamily of the Diplommatinidae, but are now known to be a separate family.

Arinia is a genus of small land snails with an operculum, terrestrial gastropod mollusks in the family Diplommatinidae. The genus was originally described by Henry and Arthur Adams in 1856.

Cochlostoma salomoni is an extinct species of land snail with an operculum, a terrestrial gastropod mollusk in the family Cochlostomatidae.

Cochlostoma septemspirale is a species of a land snail with an operculum, a terrestrial gastropod mollusk in the family Cochlostomatidae.

Diancta is a genus of sea snails in the family Diplommatinidae.

Diancta crookshanksi is a species of land snail, a gastropoda mollusk in the family Diplommatinidae.

Diplommatina is a genus of land snails with an operculum, terrestrial gastropod mollusks in the family Diplommatinidae.

Diplommatina lourinae is a species of land snail, a gastropoda mollusk in the family Diplommatinidae.

Euthema is a fossil genus of minute land snails with an operculum, terrestrial gastropod molluscs in the family Diplommatinidae from the Cretaceous Burmese and Hkamti ambers.

Moussonia is a genus of land snails with an operculum, terrestrial gastropod molluscs in the family Diplommatinidae.

Opisthostoma is a genus of minute land snails with opercula, terrestrial gastropod mollusks or micromollusks in the family Diplommatinidae.

Opisthostoma decrespignyi is a species of minute land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae. This species is endemic to Malaysia. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

Opisthostoma everettii is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.

Opisthostoma fraternum is a species of minute land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae. It is endemic to Malaysia. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

Opisthostoma goniostoma is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.

Opisthostoma grandispinosum is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.

Opisthostoma hosei is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.

Opisthostoma lituus is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.

Opisthostoma mirabile is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.

Opisthostoma pulchellum is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.

Opisthostoma shelfordi is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.

Opisthostoma stellasubis is a species of land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.

Palaina is a genus of minute land snails with opercula, terrestrial gastropod mollusks or micromollusks in the family Diplommatinidae.

Plectostoma is a genus of air-breathing land snails in the family Diplommatinidae.

Plectostoma concinnum is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.

Plectostoma laidlawi is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.

Plectostoma obliquedentatum is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.