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

Its natural habitat is subtropical or tropical moist lowland forests.

It is threatened by habitat loss.

Predators of Opisthostoma fraternum include larvae of Pteroptyx tener.

This Diplommatinidae-related article is a stub.