''Sediliopsis ondulum'' is an extinct species of

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

, a marine

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk in the family

Pseudomelatomidae Pseudomelatomidae is a family of predatory sea snails, marine gastropods included in the superfamily Conoidea (previously Conacea) and part of the Neogastropoda ( Bouchet & Rocroi, 2005). In 1995 Kantor elevated the subfamily Pseudomelatomina ...

, the turrids and allies.Don I. Tippett, ''Taxonomic notes on the western Atlantic Turridae (Gastropoda: Conoidea)''; the Nautilus v. 109 (1995-1996)
/ref>

Description

Distribution

Fossils of this species were found in Pliocene strata of Florida, USA.

References

* Fargo, William G. The Pliocene Turridae of Saint Petersburg, Florida. 1953; Monographs of the Academy of Natural Sciences of Philadelphia 18:365–409, pls. 16–24 ondulum Gastropods described in 1953 {{paleo-Pseudomelatomidae-stub