Helicodiscus parallelus
| Helicodiscus parallelus | |
|---|---|
 ![]()  | |
| A drawing of a live specimen of Helicodiscus parallelus | |
| Scientific classification | |
| Kingdom: | Animalia | 
| Phylum: | Mollusca | 
| Class: | Gastropoda | 
| (unranked): |  clade Heterobranchia clade Euthyneura  | 
| Superfamily: | Punctoidea | 
| Family: | Helicodiscidae | 
| Genus: | Helicodiscus | 
| Subgenus: | Helicodiscus | 
| Species: | H. parallelus | 
| Binomial name | |
|  Helicodiscus parallelus (Say, 1821)[1]  | |
| Synonyms | |
| 
 Helicodiscus lineatus  | |
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.

A drawing of an apertural view of the shell of Helicodiscus parallelus
Distribution
This species occurs in the following countries and islands:
- Northern Mexico. [2]
 - Great Lakes region. [3]
 - Great Britain as a "hot-house alien"
 
References
- ↑ Say, T. 1821. Descriptions of univalve shells of the United States. - Journal of the Academy of Natural Sciences of Philadelphia 2 (1): 149-179.
 - ↑ Helicodiscus parallelus at AnimalBase, accessed 15 December 2008.
 - ↑ List of non-marine mollusks of the Indiana Dunes, Lake Erie, Indiana.
 
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