''Eucithara diaglypha'' is a small

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 Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

in the family

Mangeliidae Mangeliidae is a monophyletic family of small to medium-sized, predatory sea snails, marine gastropod mollusks in the superfamily Conoidea. Bouchet, P. (2011). Mangeliidae P. Fischer, 1883. In: MolluscaBase (2016). Accessed through: World Regis ...

.WoRMS (2009). Eucithara diaglypha (Hervier, 1897). In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://marinespecies.org/aphia.php?p=taxdetails&id=433715 on 2017-05-13

Description

The length of the shell attains 6 mm, its diameter 3 mm. The small shell has an oval shape with a very short turriculated spire. The crystalline shell is thickened. It shows flexuous longitudinal ribs. These are numerous, low, with a rounded ridge, joining to their extended base. They are transversally surmounted by high, numerous, rounded, fairly strong cords. These are polished and shiny, which give them a tuberculous appearance. Between these the surface of the costulae and their intervals is remarkably covered with very fine transverse striations, flowing like wavy lines and latticed by the growth lines. The coloring is a very bright yellow in the interstices of the high ribs, presenting a tuberculate projection of a bright hyaline white. The yellow color tends to disappear on the upper

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 and at the base of the latter. The shell consists of 6 to 7 (?) whorls. The fractured apex did not allow the study of the embryonic whorls. The upper convex whorls are distinctly cone shaped and are very short by a subcanaliculate suture. 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 ...

, exceeding 2/3 of the height of the shell, is swollen in its upper part, and its convexity, barely depressed below the middle, advances regularly attenuated to the base. The oblique

aperture In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. An opt ...

is narrowly elongated. The continuous peristome forms over all the length of its insertion on the columellar lip one rounded, rather prominent small ridge. The convex outer lip is thickened, with a crenate, sharp margin and shows a series of 7 denticles. The slightly round sinus is lodged a little below the suture, notched in the thickening of the outer lip.Hervier, J. 1898. ''Descriptions d'espèces nouvelles de Mollusques provenant de l'Archipel de la Nouvelle-Calédonie.'' Journal de Conchyliologie 45: 165-195, 249-266, pls 7-8
described as ''Mangilia dealbata'' )

Distribution

This marine species occurs off

New Caledonia ) , anthem = "" , image_map = New Caledonia on the globe (small islands magnified) (Polynesia centered).svg , map_alt = Location of New Caledonia , map_caption = Location of New Caledonia , mapsize = 290px , subdivision_type = Sovereign st ...

and the Loyalty Islands

References

* Bouge, L.J. & Dautzenberg, P.L. 1914. ''Les Pleurotomides de la Nouvelle-Caledonie et de ses dependances.'' Journal de Conchyliologie 61: 123-214

External links

Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682:1-1295.
*
Virginie, et al. "Mollusca of New Caledonia." Compendium of marine species of New Caledonia. Documents Scientifiques et Techniques II7, 2nd edn. IRD, Nouméa (2007): 199-254

Muséum d'Histoire Naturelle, Paris : ''Mangilia dealbata''
{{Taxonbar, from=Q10278017 diaglypha Gastropods described in 1897