Omphalotropis plicosa is a species of small salt marsh snail with an operculum, a terrestrial gastropod mollusk, or micromollusk, in the family Assimineidae.

This species is endemic to Mauritius.

[1] It was thought to be extinct and it was listed as extinct in the 2006 IUCN Red List of Threatened Species.

[1] Living population have been found in 2002.

This Assimineidae-related article is a stub.