Leptaxis vetusa is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Helicidae, the typical snails.

This species is endemic to the Azores, Portugal.

It was assessed as Critically Endangered in 1996 but is now thought to be extinct.

Besides its shell, its anatomy is unknown.

The species type locality is the south and southeast slopes of Pico do Facho, Santa Maria Island.