Helicodiscus parallelus

Helicodiscus parallelus
A drawing of a live specimen of Helicodiscus parallelus
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Helicodiscidae
Genus:	Helicodiscus
Species:	H. parallelus
Binomial name
Helicodiscus parallelus (Say, 1821) [1]
Synonyms [2]
Helicodiscus (Helicodiscus) parallelus (Say, 1821) Helicodiscus lineatus (Say, 1817) Helicodiscus theresa Thiele, 1927 Helix lineata Say, 1817 Planorbis paralellus Say, 1821

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. ^[3]
• Great Lakes region. ^[4]
• Great Britain as a "hot-house alien"

References

1. Say, T. 1821. Descriptions of univalve shells of the United States. - Journal of the Academy of Natural Sciences of Philadelphia 2 (1): 149-179.
2. "Helicodiscus parallelus". WoRMS. World Register of Marine Species . Retrieved 30 December 2021.
3. Helicodiscus parallelus at AnimalBase, accessed 15 December 2008.
4. List of non-marine mollusks of the Indiana Dunes, Lake Erie, Indiana.