''Mangelia hooveri'' 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 Mangeliidae.Ralph Arnold, The Paleontology and Stratigraphy of the Marine Pliocene and Pleistocene of San Pedro, California; Memoirs of the California Academy of Sciences 1903 v. 3
.

Description

The length of the shell attains 10.9 mm, its diameter 3 mm. (Original description) The small, solid shell has an elongate-fusiform shape. The spire is elevated with a mammilliform apex. It contains six

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral ...

s, only slightly convex, with about ten low, rounded, slightly oblique, transverse ridges. The first whorl is smooth, while the next three are more convex than the lower ones, and have traces of spiral sculpture. The sculpture of the

body whorl The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the b ...

is nearly obsolete. The aperture is elliptical, tapering to a very short

siphonal canal The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water is ...

anteriorly. The outer lip is arcuate and thin. The columella is quite long and straight. .

Distribution

This extinct marine species was found off San Pedro, California, USA.

References

External links

Worldwide Mollusc Species Data Base : ''Mangelia hooveri''

ITIS: ''Mangelia hooveri''
{{Taxonbar, from=Q3732400 hooveri Gastropods described in 1903