''Sediliopsis angulata'' 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.

Description

The length of the shell attains 16 mm, its diameter 5–7 mm. (Original description) The pyramidal shell is sharply pointed. The beak is short and curved. The sculpture shows distant obtuse ribs on the lower half. The suture is waved, with an impressed line above it. The body whorl is short, angular on the shoulder. The body whorl shows an impressed revolving line above and four raised revolving lines inferiorly. The upper sinus of outer lip is deep and rounded, lower obsolete.G. C. Martin. 1904. Gastropoda. Maryland Geological Survey Miocene(Text):131-269
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Distribution

Fossils of this species were found in Miocene Strata of the Chesapeake Bay, Maryland, USA.

References

* Petuch & Drolshagen, Molluscan Paleontology of the Chesapeake; CRC Press, 2009 angulata Gastropods described in 1904 {{paleo-Pseudomelatomidae-stub