''Mangelia lastica'' 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 Mangeliidae. Dall W. H. (1927). Small shells from dredgings off the southeast coast of the United states by the United States Fisheries Steamer "Albatross", in 1885 and 1886; Proceedings of the United States National Museum, 70(18): 1–134

Description

The length of the shell attains 4.5 mm, its diameter 2 mm. (Original description) The short, small, shell is polished, whitish and solid. It has a large

protoconch A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called ...

of 1½

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 ...

and 3½ subsequent whorls. The suture is distinct, not appressed. The fasciole is inconspicuous. The whorls are moderately rounded. The aperture is about half the whole length. The axial sculpture consists of more or less obscure folds, stronger on the early whorls, seldom differentiated into distinct ribs, sometimes forming a rounded shoulder to the whorls. Beside these there are irregularly distributed incremental lines. There is no indication of any spiral sculpture. The aperture is narrow. The

anal sulcus The anal sulcus, also called the anal sinus or anal canal, in Gastropods is a notch, a shelly tube at the top of the aperture In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and fo ...

is hardly evident. The outer lip is straight, thin or very slightly thickened. The columella is straight, the axis not pervious.

Distribution

This marine species was found off Fernandina, Florida, United States.

References

External links

Smithsonian Institution: Mangilia lastica

Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682:1–1295
{{DEFAULTSORT:Mangelia Loraeformis loraeformis Gastropods described in 1927