Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Gastropoda
Subclassis: Caenogastropoda
Ordo: Littorinimorpha
Superfamilia: Truncatelloidea
Familia: Truncatellidae
Subfamiliae (2): Geomelaniinae – Truncatellinae
Genera Incertae sedis (5): †Eosopyrgula – †Glibertiella – †Nystia – †Obtusospira – †Sandbergerina
Overview of genera (3 + 5†)
Geomelania – Taheitia – Truncatella – †Eosopyrgula – †Glibertiella – †Nystia – †Obtusospira – †Sandbergerina
Name
Truncatellidae Gray, 1840
References
Gray, J.E. 1840. Shells of molluscous animals. In: Synopsis of the contents of the British Museum, ed. 42: 105–152.
Bouchet, P., & J.-P. Rocroi. 2005. Classification and nomenclator of gastropod families. Malacologia 47(1-2): 1–397.
Links
Truncatellidae in the World Register of Marine Species
Truncatellidae – Taxon details on Interim Register of Marine and Nonmarine Genera (IRMNG).
Vernacular names
English: looping snails
Truncatellidae, common name the "looping snails", is a family of small amphibious snails, with gills and an operculum, semi-marine gastropod mollusks or micromollusks.
Shell description
Drawing of a shell of Truncatella bilabiata
This family of snails have small shells which lose their apical whorls as they continue to grow, giving the shells a truncated and cylindrical appearance.
Subfamilies
The family Truncatellidae consists of two subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005):[2]
subfamily Truncatellinae Gray, 1840
subfamily Geomelaniinae Kobelt & Möllendorff, 1897[3]
Genera
Genera within the family Truncatellidae include:
Truncatellinae
Truncatella Risso, 1826[4] - type genus of the family Truncatellidae[2]
Geomelaniinae
Geomelania L. Pfeiffer, 1845 - type genus of the subfamily Geomelaniinae[2]
subfamily ?
†Nystia
Taheitia Adams, 1863[4]
Habitat
Snails in this family are found in marine coastal environments, near or just above the high tide line on stones and pebbles, fine sediments and decomposing vegetation.
Life cycle
The sexes are separate. Fertilized eggs are laid as egg capsules, which are attached to detritus.
References
Gray (1840). Synopsis of the contents of the British Museum ed. 42: 117, 148.
Bouchet, Philippe; Rocroi, Jean-Pierre; Frýda, Jiri; Hausdorf, Bernard; Ponder, Winston; Valdés, Ángel & Warén, Anders (2005). "Classification and nomenclator of gastropod families". Malacologia. 47 (1–2). Hackenheim, Germany: ConchBooks: 1–397. ISBN 3-925919-72-4. ISSN 0076-2997.
Kobelt & Möllendorff (1897). Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft 29(5-6): 74.
"Mollusca" Archived 2012-06-26 at the Wayback Machine. Diversidad Biológica Cubana, accessed 23 March 2011.
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