This species is endemic to São Tomé and Príncipe, off the west coast of Africa in the Gulf of Guinea.

[1] The Obô giant snail lives in the primary rainforest on the mountains.

It suffers from habitat loss, the mass collection of the shells and harvesting the snails for food.

The species got largely displaced by the smaller West African giant land snail (Archachatina marginata), which was introduced to the island in the 1980 and also brought diseases.

Formerly occurring throughout much of Principe, it is now only found in an area of some 46 km2 in the protected forests in the south of the island.