''Georissa biangulata'' is a species of minute cave snails that have an operculum. They are

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusks in the family

Hydrocenidae Hydrocenidae is a taxonomic family of minute land snails or cave snails with an operculum, terrestrial gastropod mollusks or micromollusks in the clade Cycloneritimorpha. Hydrocenidae are widespread across the Palearctis and Africa, but r ...

Distribution

This species is endemic to Guam.

References

Hydrocenidae Fauna of Guam Cave snails Molluscs of Oceania Gastropods described in 1894 Taxonomy articles created by Polbot {{Neritimorpha-stub