Triviella, common name the smooth pearl cowries, is a genus of small sea snails, marine gastropod molluscs in the family Triviidae, the trivias.Gofas, S. (2010). Triviella Jousseaume, 1884. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=391358 on 2010-12-13
Characteristics The genus *Triviella* (formerly considered a subgenus of *Trivia*) includes several species that are highly similar and often require microscopic examination of the live animal for accurate species-level identification. The shells of smooth pearl cowrie species are inflated and globular, with a thickened labrum (outer lip of the aperture) that features well-developed denticles. These denticles often extend as transverse ridges around the outer lip, occasionally reaching the lower lateral part of the dorsum. Additionally, the inner lip of the aperture is also denticulate.
Species Species within the genus Triviella include:
Triviella amaryllis Schilder, 1925 Triviella aperta (Swainson, 1822)WoRMS : Triviella Triviella bogeni Beals & Lorenz, 2025 Triviella calvariola (Kilburn, 1980) Triviella carptima Fehse, 2016 Triviella chiapponii Fehse, 2016 Triviella costata (Gmelin, 1791) Triviella debruini (Lorenz, 1994) Triviella eratoides (Liltved, 1986) Triviella franziskae Fehse & Massier, 2000 Triviella goslineri (Liltved & Millard, 1994) Triviella immelmani Rosenberg & Finley, 2001 Triviella insolita Fehse & Grego, 2007 Triviella khanya (Liltved, 1986) Triviella lemaitrei (Liltved, 1986) Triviella lorenzi Fehse, 2016Fehse D. (2016). "Revision of the Genus Triviella Jousseaume, 1884 (Mollusca, Gastropoda) (Contributions to the knowledge of the Triviidae, XXX)". Acta Conchyliorum (15): 211 pp. Triviella lowtheri Beals, 2008 Triviella magnidentata (Liltved, 1986) Triviella martybealsi Fehse, 2016 Triviella massieri (Martin & Poppe, 1991) Triviella millardi (C. N. Cate, 1979) Triviella montorum Fehse, 2016 Triviella multicostata (Liltved, 1986) Triviella neglecta Schilder, 1930 Triviella ovulata (Lamarck, 1811) Triviella phalacra Schilder, 1930 † Triviella pompholugota (Tate, 1890) [MolluscaBase eds. (2025). MolluscaBase. Triviella pompholugota (Tate, 1890) †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=875109 on 2025-09-24] Triviella pseudovulata Schilder & M. Schilder, 1929 Triviella rubra (Shaw, 1909) Triviella sanctispiritus (Shikama, 1974) Triviella sharonae (Hayes, 1993) Triviella splendidissima Tomlin, Schilder & M. Schilder, 1934 Triviella verhoefi (Gosliner & Liltved, 1981) Triviella vesicularis (Gaskoin, 1836) Triviella williami Fehse, 2006
Species brought into synonymy Triviella gamma Mestayer, 1927: synonym of Pusula pediculus (Linnaeus, 1758) Triviella maoriensis Mestayer, 1927: synonym of Ellatrivia merces (Iredale, 1924) Triviella memorata Finlay, 1926: synonym of Ellatrivia merces (Iredale, 1924) Triviella merces Iredale, 1924: synonym of Ellatrivia merces (Iredale, 1924) Triviella porcellio Cate, 1979: synonym of Triviella neglecta Schilder, 1930 Triviella virginiae (Liltved, 1986): synonym of Triviella vesicularis (Gaskoin, 1836)
References
Further reading
Fehse D. & Massier W. (2000). "A new Triviella (Gastropoda: Triviidae) from South Africa". La Conchiglia 32(294–295): 123–126. Fehse D. (2016). Contributions to the knowledge of the Triviidae, XXX. Revision of the genus Triviella Jousseaume, 1884 (Mollusca: Gastropoda). Acta Conchyliorum. 15: 7-211.