''Haplocochlias swifti'' is a
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 Skeneidae
The Skeneidae are a speciose family of minute to small marine gastropod molluscs in the superfamily Trochoidea.Bouchet, P.; Gofas, S. (2013). Skeneidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php ...
.
Description
(Original description by E.G. Vanatta) The height of the shell attains 3.9 mm. The small, umbilicate, white shell has a turbinate shape. Its
suture is deeply impressed. The
spire is elevated and contains 5 very convex
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. These are contabulate, the first whorl somewhat eroded, the two following whorls bicarinate, the penultimate and
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 ...
more or less tricarinate. The body whorl is sculptured with 24 spaced spiral striae with microscopic vertical striae in the interstices. The fourth, sixth and eighth striae below the
suture on the body whorl are larger than the others and three or four striae near the
umbilicus are closer together. The umbilicus is of moderate size. The
aperture is orbicular. The continuous
peristome is very thick, and broadly refiexed, crenate. The parietal callus is thick. The
columella is narrow above and broad at the base, bearing a median groove.
E.G. Vanatta (1913) Description of new species of marine shells; Proceedings of the Academy of Natural Sciences of Philadelphia v. 65 (1913)
/ref>
Distribution
This species occurs in the Caribbean Sea, the Gulf of Mexico and off the Lesser Antilles at depths between 5 m and 45 m.
References
* Vanatta, E. G. 1913. ''Descriptions of new species of marine shells''. Proceedings of the Academy of Natural Sciences of Philadelphia 65: 22–27, pl. 2
External links
*
{{DEFAULTSORT:Haplocochlias Swifti
swifti
Gastropods described in 1913