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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: Heterobranchia
Infraclassis: Euthyneura
Cohors: Tectipleura
Subcohors: Panpulmonata
Superordo: Eupulmonata
Ordo: Stylommatophora
Subordo: Helicina
Superfamilia Incertae sedis: Testacelloidea
Familia (1): Testacellidae

Testacelloidea Gray, 1840

Testacelloidea in the World Register of Marine Species
Testacelloidea – Taxon details on Integrated Taxonomic Information System (ITIS).

The Testacelloidea are a superfamily of air-breathing land snails and slugs, terrestrial gastropod mollusks in the suborder Helicina of the order Stylommatophora .[1] [2]

The families within the Testacelloidea are as follows:[1]

Family Testacellidae Gray, 1840

This taxonomy was based on the study by Nordsieck, published in 1986,[3] and the publication by Schileyko in 2000.[4]

The following families, previously categorized within the Testacelloidea, were transferred to the superfamily Oleacinoidea H. Adams & A. Adams, 1855 in 2017.[5]

Family Oleacinidae H. Adams & A. Adams, 1855
Family Spiraxidae H. B. Baker, 1939


Bouchet, Philippe; Rocroi, Jean-Pierre; Frýda, Jiri; Hausdorf, Bernard; Ponder, Winston; Valdés, Ángel & Warén, Anders (2005). "Classification and nomenclator of gastropod families". Malacologia. Hackenheim, Germany: ConchBooks. 47 (1–2): 1–397. ISBN 3-925919-72-4. ISSN 0076-2997.
MolluscaBase eds. (2020). MolluscaBase. Testacelloidea Gray, 1840. Accessed through: World Register of Marine Species at: on 2020-11-09
H. Nordsieck (1986). "The system of the Stylommatophora (Gastropoda), with special regard to the systematic position of the Clausiliidae, II. Importance of the shell and distribution". Archiv für Molluskenkunde. 117 (1–3): 93–116.
A.A. Schileyko (1998–2003). "Treatise on recent terrestrial pulmonate molluscs". Ruthenica. suppl. 2: 1–1626.
Bouchet, Philippe; Rocroi, Jean-Pierre; Hausdorf, Bernhard; Kaim, Andrzej; Kano, Yasunori; Nützel, Alexander; Parkhaev, Pavel; Schrödl, Michael; Strong, Ellen E. (December 2017). "Revised classification, nomenclator and typification of gastropod and monoplacophoran families". Malacologia. 61 (1–2): 1–526. doi:10.4002/040.061.0201.

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