Pyrgula annulata

Pyrgula annulata (*)

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Gastropoda
Subclassis: Orthogastropoda
Superordo: Caenogastropoda
Ordo: Sorbeoconcha
Subordo: Hypsogastropoda
Infraordo: Littorinimorpha
Superfamilia: Rissooidea
Familia: Hydrobiidae
Genus: Pyrgula
Species: Pyrgula annulata

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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

* http://www.animalbase.uni-goettingen.de/zooweb/servlet/AnimalBase/home/species?id=2836
* black and white drawings of shell:
o Adams H. & Adams A. 1858. The genera of recent Mollusca: arranged according to their organization. plate 32 figure 7.
o 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.