Olivoidea

Olivoidea is a taxonomic superfamily of minute to medium-large predatory sea snails, marine gastropod mollusks in the order Neogastropoda.

Taxonomy
According to the Revised Classification, Nomenclator and Typification of Gastropod Families (2017), the superfamily Olivoidea has five families:
 * Family Olividae Latreille, 1825 – Olivellidae is the subfamily Olivellinae in Olividae.
 * Family Ancillariidae Swainson, 1840
 * Family Bellolividae Kantor, Fedosov, Puillandre, Bonillo & Bouchet, 2017
 * Family Benthobiidae Kantor, Fedosov, Puillandre, Bonillo & Bouchet, 2017
 * Family Pseudolividae de Gregorio, 1880
 * Synonyms:
 * Family Dactylidae H. Adams & A. Adams, 1853 : synonym of Olivinae Latreille, 1825
 * Subfamily Dipsaccinae P. Fischer, 1884 : synonym of Ancillariidae Swainson, 1840
 * Family Olivancillariidae Golikov & Starobogatov, 1975 : synonym of Olivancillariinae Golikov & Starobogatov, 1975
 * Family Olivellidae Troschel, 1869 : synonym of Olivellinae Troschel, 1869
 * Subfamily † Vanpalmeriinae Adegoke, 1977 : synonym of Ancillariidae Swainson, 1840
 * Family Zemiridae Iredale, 1924 : synonym of Pseudolividae de Gregorio, 1880