# Turbonilla aresta

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{{Short description|Species of gastropod}}
{{Speciesbox
| image = Turbonilla aresta 001.png
| image_caption = Drawing of a [shell](/source/gastropod_shell) of ''Turbonilla aresta''
| genus = Turbonilla
| species = aresta
| authority = [Dall](/source/William_Healey_Dall) & [Bartsch](/source/Paul_Bartsch), 1909<ref name="Dall" />
| synonyms_ref = 
| synonyms = ''Turbonilla (Strioturbonilla) aresta'' Dall & Bartsch, 1909
}}

'''''Turbonilla aresta''''' is a [species](/source/species) of [sea snail](/source/sea_snail), a [marine](/source/marine_(ocean)) [gastropod](/source/gastropod) [mollusc](/source/mollusc) in the [family](/source/Family_(taxonomy)) [Pyramidellidae](/source/Pyramidellidae), the pyrams and their allies.<ref name="WoRMS">Rosenberg, G. (2011). ''Turbonilla aresta'' Dall & Bartsch, 1909. Accessed through:  [World Register of Marine Species](/source/World_Register_of_Marine_Species) at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581302 on 2012-03-01</ref><ref>Turgeon, D.; Quinn, J.F.; Bogan, A.E.; Coan, E.V.; Hochberg, F.G.; Lyons, W.G.; Mikkelsen, P.M.; Neves, R.J.; Roper, C.F.E.; Rosenberg, G.; Roth, B.; Scheltema, A.; Thompson, F.G.; Vecchione, M.; Williams, J.D. (1998). Common and scientific names of aquatic invertebrates from the United States and Canada: mollusks. 2nd ed. American Fisheries Society Special Publication, 26. American Fisheries Society: Bethesda, MD (USA). {{ISBN|1-888569-01-8}}. IX, 526 + cd-rom pp.</ref>

==Description==
The milk-white shell is very slender. Its length measures 6.4&nbsp;mm. The 2½ [whorl](/source/Whorl_(mollusc))s of the [protoconch](/source/protoconch) are small and form a moderately elevated, hehcoid [spire](/source/Spire_(mollusc)), which has its axis at right angles to that of the succeeding whorls, and is not at all immersed. The 13 whorls of the [teleoconch](/source/teleoconch) are moderately rounded. They are marked by sublamellar, protractive axial ribs, which extend undiminished to the summit of the whorls, rendering this crenulated. There are 14 of these upon the first three whorls, 16 upon the fourth to eighth, 18 upon the ninth, 20 upon the tenth and eleventh, and 21 upon the penultimate turn. The intercostal spaces are about one and one-half times as wide on all but the last three whorls. On the latter they are about as wide as the ribs and terminate a little posterior to the [suture](/source/Suture_(anatomy)). The sutures are strongly marked. The periphery of the [body whorl](/source/body_whorl) is faintly angulated. The base of the shell is short, and well rounded. The [aperture](/source/Aperture_(mollusc)) is moderately large and has a subquadrate shape. The posterior angle is obtuse. The [outer lip](/source/Lip_(gastropod)) is thin, and bent almost at right angles to the anterior lateral angle. The [columella](/source/Columella_(gastropod)) is slender, slightly curved and slightly revolute.<ref name="Dall">[https://www.biodiversitylibrary.org/item/32384#page/8/mode/1up Dall & Bartsch (1909), ''A Monograph of West American Pyramidellid Mollusks'', United States National Mollusks, bulletin 68; p. 54]</ref>

==Distribution==
The type specimen was found in the Pacific Ocean off [Catalina Island](/source/Santa_Catalina_Island%2C_California), California.

==References==
{{Reflist}}

==External links==
* [http://www.marinespecies.org/aphia.php?p=taxdetails&id=581302 World Register of Marine Species]

{{Taxonbar|from=Q3177045}}

aresta
Category:Gastropods described in 1909
Category:Taxa named by William Healey Dall
Category:Taxa named by Paul Bartsch

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Adapted from the Wikipedia article [Turbonilla aresta](https://en.wikipedia.org/wiki/Turbonilla_aresta) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Turbonilla_aresta?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.