Pyramidella acus
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia
clade Euthyneura
clade Panpulmonata
Family: Pyramidellidae
Subfamily: Pyramidellinae
J. E. Gray, 1840[1]

See text

14 genera

(12 genera in Pyramidellini + 2 genera in Sayellini)


Obeliscidae A. Adams, 1863 (inv.)
Plotiidae Focart, 1951 (inv.)

Pyramidellinae is a taxonomic subfamily of minute sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies.


It is one of eleven recognised subfamilies of the marine gastropod family Pyramidellidae (according to the taxonomy of Ponder & Lindberg, 1997), which are as follows: Odostomiinae, Turbonillinae, Chrysallidinae, Cingulininae, Cyclostremellinae, Sayellinae, Syrnolinae, Eulimellinae, Pyramidellinae, Odostomellinae and Tiberiinae.

2005 taxonomy

In the taxonomy of Bouchet & Rocroi (2005),[3] this subfamily consists of the following tribes, adding the tribe Sayellini containing only two genera Sayella and Petitella.


According to Schander, Van Aartsen & Corgen (1999)[2] there are 12 genera within the Pyramidellinae:

tribe Pyramidellini

tribe Sayellini

Main article: Sayellini


  1. Gray, J. E. (1840). Synopsis of the contents of the British Museum, 42nd edition. London. p. 370 pp.
  2. 1 2 Schander, C., van Aartsen, J. J., Corgan, J. C. (1999). "Families and genera of the Pyramidelloidea (Mollusca: Gastropoda)". Bollettino Malacologico. 34 (9-12): 145–166.
  3. 1 2 Bouchet P.; Rocroi J.-P.; Frýda J.; Hausdorf B.; Ponder W.; Valdés Á. & Warén A. (2005). "Classification and nomenclator of gastropod families". Malacologia: International Journal of Malacology. Hackenheim, Germany: ConchBooks. 47 (1-2): 1–397. ISBN 3-925919-72-4. ISSN 0076-2997.
  4. WoRMS (2010). Longchaeus. Accessed through: World Register of Marine Species at on 2011-03-16
  5. WoRMS (2010). Otopleura. Accessed through: World Register of Marine Species at on 2011-03-16
  6. WoRMS (2010). Triptychus Mörch, 1875. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at on 2011-03-16
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