Pyrgula annulata (Information about this image)
Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: ParaHoxozoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Gastropoda
Subclassis: Caenogastropoda
Ordo: Littorinimorpha
Superfamilia: Truncatelloidea
Familia: Hydrobiidae
Subfamilia: Pyrgulinae
Genus: Pyrgula
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
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
Wikimedia Commons has media related to Pyrgula annulata.
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.
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