Pyrgula annulata

Pyrgula annulata
Apertural view of two shells of Pyrgula annulata.
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Family:	Hydrobiidae
Genus:	Pyrgula
Species:	P. annulata
Binomial name
Pyrgula annulata (Linnaeus, 1758) [1]
Synonyms
Turbo annulatus Linnaeus, 1758 Melania helvetica Michelin, 1831 Pyrgula helvetica (Michelin, 1831)

Pyrgula annulata is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae.

Pyrgula annulata is the type species of the genus Pyrgula.

Distribution

This species occurs in Switzerland, Italy, Croatia, and Albania.

References

1. Linnaeus C. 1758. Systema naturae per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata. pp. [1-4], 1-824. Holmiae. (Salvius).

External links

• AnimalBase info
• black and white drawings of shell:
  • Adams H. & Adams A. 1858. The genera of recent Mollusca: arranged according to their organization. plate 32 figure 7.
  • Call R. E. & Pilsbry H. A. 1886. On Pyrgulopsis, a new genus of rissoid mollusk, with description of two new forms. Proceeding Davenport Academy of Natural Sciences, volume V., page 9-14. Plate II., figures 11-12.