Speightiidae is an extinct

taxonomic 280px, Generalized scheme of taxonomy Taxonomy is a practice and science concerned with classification or categorization. Typically, there are two parts to it: the development of an underlying scheme of classes (a taxonomy) and the allocation ...

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserve ...

sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...

s, marine gastropod mollusks. This family is not assigned to a superfamily. It has been traditionally classified near the family

Turridae Turridae is a Taxonomy (biology), taxonomic family (biology), family name for a number of predatory sea snails, Marine (ocean), marine gastropod mollusks in the superfamily Conoidea.MolluscaBase (2018). Turridae H. Adams & A. Adams, 1853 (1838). ...

. But in 1993 it was shown that many, if not all, species that were placed in this family should instead be placed in the family

Fasciolariidae Fasciolariidae is a family of small to large sea snails, marine gastropod mollusks in the superfamily Buccinoidea. Species in Fasciolariidae are commonly known as tulip snails and spindle snails. The family Fasciolariidae most likely appeared ...

. There are currently only two accepted genera within the family, ''Andicula'' and ''Speightia''. Both of these are monotypic, including a single species each: '' Andicula occidentalis'' and '' Speightia spinosa'' .

References

Prehistoric gastropods Taxa named by Arthur William Baden Powell Gastropod families {{paleo-gastropod-stub