Helicodiscus parallelus
# Helicodiscus parallelus

Helicodiscus parallelus, common name the compound coil, is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helicodiscidae.

Helicodiscus parallelus is the type species of the genus Helicodiscus.

## Distribution

This species occurs in the following countries and islands:

* Northern Mexico.
* Great Lakes region.
* Great Britain as a "hot-house alien"
