The Pyramidellidae Family includes 3398 species comprising 7 subfamilies (Turbonillinae (22 genus), Syrnolinae (2), Pyramidellinae (2), Odostomiinae (2), Moerchiinae (2), Cyclostremellinae (2), ...)
and 148 genus (Turbonilla (1056 species), Odostomia (481), Eulimella (189), Pyrgulina (187), Syrnola (137), Parthenina (114), ...)

Phylum      : Mollusca
 Class       : ⤷Gastropoda 
  Subclass    : ⤷Heterobranchia 
   Infraclass  : ⤷Euthyneura 
    Subterclass : ⤷Tectipleura 
     Superorder  : ⤷Pylopulmonata 
      Superfamily : ⤷Pyramidelloidea 
       Family      : ⤷Pyramidellidae

Common name : pyramid snails or worm snails

Aspect : elongated, conical, and turreted (resembling a pyramid or tower), with a high spire composed of many whorls; often white, cream, or translucent; ranging from 1–10 mm (some reach up to 20 mm); narrow aperture, with a simple inner lip and no operculum (in most species)

Feeding : ectoparasites i.e. sucking out fluids and hemolymph (mollusk "blood"), often without fully entering the host (oysters, clams, polychaete worms, occasionally gastropods)

Environment : mostly in temperate and tropical regions (Indo-Pacific and Atlantic coasts) on soft sediments, seagrass beds, coral reefs, and rocky substrates worldwide; from intertidal zones to 2000 m depth

Longchaeus acus (Gmelin, 1791)

Pyramidella dolabrata (Linnaeus, 1758)

Total collection for Pyramidellidae : 2 species (7 shells in total)