''Aoteatilia substriata'' 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

Columbellidae The Columbellidae, the dove snails or dove shells, are a family of minute to small sea snails, marine gastropod mollusks in the order Neogastropoda.Bouchet, P.; Gofas, S. (2010). Columbellidae. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) Wo ...

.MolluscaBase eds. (2021). MolluscaBase. Aoteatilia substriata (Suter, 1899). Accessed through: World Register of Marine Species at: https://marinespecies.org/aphia.php?p=taxdetails&id=511813 on 2021-08-07

Description

The length of the shell attains 5.5 mm, its diameter 2.25 mm. (Original description) The small, thin and fragile shell has a mitriform shape. it is white with a violet apex, finely spirally striated. The sculpture consists of delicate equal and numerous fine spiral striae, extending over the whole shell except 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 ...

. The spiral below the suture is a little stronger than the others; frequent inequidistant faint growth periods form the only axial sculpture. The colour of the shell is whitish, the protoconch light violet. The spire is elevated, conic, about 1½ times the height of the aperture. The protoconch consists of 1¾

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, smooth, globose, the nucleus flatly convex, slightly lateral. The shell contains 6 whorls, regularly increasing, moderately convex. The base of the shell is slightly contracted. The suture is not deep, margined by the spirals. The aperture is very little oblique, subrhomboidal, angled above, produced below into a very short broad recurved

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 ...

, its base lightly emarginate. The outer lip is regularly convex, somewhat thickened inside, minutely crenate. The columella is vertical, slightly arcuate, excavated on meeting the parietal wall, twisted below with a slightly raised edge. The inner lip is thin and narrow, smooth. The operculum is unknown. Henry Suter (1913): Manual of the New Zealand Mollusca; Government of New Zealand, Wellington, N.Z.
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Distribution

This marine species is endemic to New Zealand and occurs off Foyaux Strait, North Island.

References

* Suter, T.N.Z.I., xxxi, 1898 (1899), 76, pi. 3, f. 6 * Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. Pp 196-219. in: Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch * Maxwell, P.A. (2009). Cenozoic Mollusca. Pp 232-254 in Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch

External links

* {{DEFAULTSORT:Aoteatilia Substriata substriata Gastropods described in 1899 Gastropods of New Zealand