The light yellow shell has an elongate-ovate shape and is stout and strong. Its length measures 4.5 mm. (The whorls of the protoconch are decollated.) The 5+1⁄2whorls of the teleoconch are flattened on their outer three-fourths, rounding suddenly to the closely appressed summit, on the posterior fourth. The entire surface of the shell is marked by lines of growth and numerous equal and equally spaced, well marked spiral striations, of which about 28 occur between the sutures of the penultimate whorl. The sutures are well impressed. The periphery of the body whorl is somewhat angulated. The base of the shell is elongated, rounded, and marked like the spire. The aperture is ovate, and slightly effuse anteriorly. The posterior angle is acute. The outer lip is thin. The columella is short, strongly curved and reflected. It is reinforced for the greater part by the attenuated base and provided with a strong oblique fold at its insertion. The parietal wall is covered by a thin callus.[3]
^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). ISBN1-888569-01-8. IX, 526 + cd-rom pp.
^Dall, William Healy & Bartsch, Paul (December 13, 1909). "A Monograph of West American Pyramidellid Mollusks". Bulletin of the United States National Museum. 68: 203.
External linksedit
World Register of Marine Species
ITIS
January 01, 1970
odostomia, unalaskensis, species, snail, first, described, william, healy, dall, paul, bartsch, 1909, marine, gastropod, mollusc, family, pyramidellidae, pyrams, their, allies, drawing, shell, scientific, classification, domain, eukaryota, kingdom, animalia, p. Odostomia unalaskensis is a species of sea snail first described by William Healy Dall and Paul Bartsch in 1909 It is a marine gastropod mollusc in the family Pyramidellidae the pyrams and their allies 1 2 Odostomia unalaskensis Drawing of the shell Scientific classification Domain Eukaryota Kingdom Animalia Phylum Mollusca Class Gastropoda Subclass Heterobranchia Family Pyramidellidae Genus Odostomia Species O unalaskensis Binomial name Odostomia unalaskensisDall amp Bartsch 1909 Synonyms Evalea unalaskensis Dall amp Bartsch 1909 Odostomia Evalea unalaskensis Dall amp Bartsch 1909 basionym Contents 1 Description 2 Distribution 3 References 4 External linksDescription editThe light yellow shell has an elongate ovate shape and is stout and strong Its length measures 4 5 mm The whorls of the protoconch are decollated The 5 1 2 whorls of the teleoconch are flattened on their outer three fourths rounding suddenly to the closely appressed summit on the posterior fourth The entire surface of the shell is marked by lines of growth and numerous equal and equally spaced well marked spiral striations of which about 28 occur between the sutures of the penultimate whorl The sutures are well impressed The periphery of the body whorl is somewhat angulated The base of the shell is elongated rounded and marked like the spire The aperture is ovate and slightly effuse anteriorly The posterior angle is acute The outer lip is thin The columella is short strongly curved and reflected It is reinforced for the greater part by the attenuated base and provided with a strong oblique fold at its insertion The parietal wall is covered by a thin callus 3 Distribution editThe type species was found off Unalaska Alaska References edit Rosenberg G 2011 Odostomia unalaskensis Dall amp Bartsch 1909 Accessed through World Register of Marine Species at http www marinespecies org aphia php p taxdetails amp id 581266 on 2012 01 12 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 Dall William Healy amp Bartsch Paul December 13 1909 A Monograph of West American Pyramidellid Mollusks Bulletin of the United States National Museum 68 203 External links editWorld Register of Marine Species ITIS Retrieved from https en wikipedia org w index php title Odostomia unalaskensis amp oldid 1024062695, wikipedia, wiki, book, books, library,
