Pyrgula annulata

Pyrgula annulata

Photo of apertural view of shells of Pyrgula annulata.
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda clade Hypsogastropoda clade Littorinimorpha
Superfamily:	Rissooidea
Family:	Hydrobiidae
Subfamily:	Pyrgulinae
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.

^ 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).

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.