Alopia subcosticollis is a species of small, tropical, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Clausiliidae.

[2] The sinistral shell is reddish-violet in color.

It is often covered by milky surface layers and is nearly smooth.

The cervix features strong, typically short, white corrugated ribs extending from the keel region.

[2] This article incorporates text from this source, which is in the public domain.