Archerd Shell Collection > Shell Classes > Gastropoda > Potamididae

Superfamily: Cerithioidea (Ceriths)
Families: Potamididae (Horn Shells), Battillariidae and Thiaridae

These shells, and those shown on the Cerithiidae family page, are all rather similar members of the same superfamily. The molluscs are all major dwellers in muddy fresh or brackish water, and all generally have a tropical distribution. In the Potamididae family, slender, brown-colored shells show an anterior notch near the top of the aperture, like those of the Cerithiidae family. However, Potamididae shells have a less strongly developed anterior notch and a thin, horny operculum with many, rather than fewer whorls. Battilariidae molluscs differ from the Potanididae mainly in sperm structure. Shells shown in this group generally range from 1 cm to 4 cm or more in length and are considerably larger than most of the Cerithidae shells shown on the previous page.

Pyrazus ebeninus, is closely related and also lives in muddy waters and shares similar characteristics (see also, Photo Gallery, below). Like snails in the Pulmonata subclass, it is an air-breather which has lost its gill.
Class: Gastropoda
Clade: Sorbeconcha
Superfamily: Cerithioidea
Family: Cerithiidae
Family: Potamididae
Family: Battilariidae
Family: Pachychilidae
Family: Thiaridae

Major Genera
  • Genus: Battilaria
  • Genus: Cerithide
  • Genus: Faunus
  • Genus: Pirenella
  • Genus: Telescopium
  • Genus: Terebralia
  • Genus: Rhinocoryne

Battillaria zonalis (Burguière, 1792)
Zoned Cerith

Battillaria minima (Gmelin, 1791)
False Caribbean Cerith, 2.1 cm
Family: Batillariidae

Faunus ater (Born, 1778)
Black Faun
Family: Thiaridae


Cerithioidea (Ceriths)
Photo Gallery

Archerd Shell Collection > Shell Classes > Gastropoda > Horn Snails