''Longchaeus conicus'' 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 Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

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 Pyramidellidae, the pyrams and their allies.MolluscaBase eds. (2022). MolluscaBase. Longchaeus conicus (C. B. Adams, 1852). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1547981 on 2022-03-13Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064

Description

The shell has a very regularly elongate, conic shape. The early whorls are flesh-colored; the later ones light brown with an occasional varix of flesh color. The length of the shell measures 13 mm. There are at least 2½

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 in the

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 ...

. They are depressed helicoid, having their axis almost at right angles to that of the succeeding turns, in the first of which they are about half immersed. The thirteen whorls of the teleoconch are decidedly flattened, slightly shouldered and weakly crenulated at the summit. They are marked with a strong peripheral sulcus which is crossed by numerous axial threads. The periphery 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 slightly angulated. The base of the shell is short, and well rounded. It is provided with a strong fasciole at the insertion of the columella. The entire surface of the spire and the base is marked by numerous exceedingly fine lines of growth only. The aperture is oval. The posterior angle is acute. The outer lip of the specimen is fractured, reinforced within by five slender lirations. The columella is strong, and slightly revolute. The posterior lamella is very strong; the anterior two much weaker and much more oblique. The parietal wall is glazed with a faint callus.Dall & Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p. 21-22: 1909
/ref>

Distribution

This marine species occurs in the Pacific Ocean off Panama Bay.

References

External links

To World Register of Marine Species
{{Taxonbar, from=Q7263313 Pyramidellidae Gastropods described in 1852