Odostomia (Evalea) donilla Dall & Bartsch, 1909 (basionym)
According to ITIS, this species is a synonym of Odostomia gravida Gould, 1853.[3] Dall & Bartsch made the distinction based upon the length of the adult shell (O. donilla 4.5 mm and O. gravida 6.5 mm) and the incised spiral lines moderately strong in O. donilla, but exceedingly fine in O. gravida.
The broadly conic shell is bluish-white. It measures 4.5 mm. The nuclear whorls are deeply obliquely immersed in the first of the succeeding turns, above which only the tilted edge of the last volution projects. The six post-nuclear whorls are well rounded, slightly contracted at the suture and appressed at the summit. The periphery of the body whorl is angulated. The base of the shell is slightly rounded, sloping abruptly from the periphery to the umbilical area. The sutures are slightly impressed. The entire surface of the base and the spire is marked by numerous almost vertical lines of growth and many well-incised spiral striations. The aperture is ovate, slightly effuse anteriorly. The posterior angle is acute. The outer lip is thin. The columella is strongly curved, reflected, reinforced by the base, and provided with a strong fold at its insertion.[4]
Distributionedit
This species occurs in the Pacific Ocean off California.
^William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909
External linksedit
To USNM Invertebrate Zoology Mollusca Collection
To World Register of Marine Species
January 01, 1970
odostomia, donilla, species, snail, marine, gastropod, mollusc, family, pyramidellidae, pyrams, their, allies, apertural, view, shell, scientific, classification, domain, eukaryota, kingdom, animalia, phylum, mollusca, class, gastropoda, subclass, heterobranch. Odostomia donilla is a species of sea snail a marine gastropod mollusc in the family Pyramidellidae the pyrams and their allies 1 2 Odostomia donilla Apertural view of a shell of Odostomia donilla Scientific classification Domain Eukaryota Kingdom Animalia Phylum Mollusca Class Gastropoda Subclass Heterobranchia Family Pyramidellidae Genus Odostomia Species O donilla Binomial name Odostomia donillaDall amp Bartsch 1909 Synonyms Odostomia Evalea donilla Dall amp Bartsch 1909 basionym According to ITIS this species is a synonym of Odostomia gravida Gould 1853 3 Dall amp Bartsch made the distinction based upon the length of the adult shell O donilla 4 5 mm and O gravida 6 5 mm and the incised spiral lines moderately strong in O donilla but exceedingly fine in O gravida Contents 1 Description 2 Distribution 3 References 4 External linksDescription editThe broadly conic shell is bluish white It measures 4 5 mm The nuclear whorls are deeply obliquely immersed in the first of the succeeding turns above which only the tilted edge of the last volution projects The six post nuclear whorls are well rounded slightly contracted at the suture and appressed at the summit The periphery of the body whorl is angulated The base of the shell is slightly rounded sloping abruptly from the periphery to the umbilical area The sutures are slightly impressed The entire surface of the base and the spire is marked by numerous almost vertical lines of growth and many well incised spiral striations The aperture is ovate slightly effuse anteriorly The posterior angle is acute The outer lip is thin The columella is strongly curved reflected reinforced by the base and provided with a strong fold at its insertion 4 Distribution editThis species occurs in the Pacific Ocean off California References edit WoRMS 2011 Odostomia donilla Dall amp Bartsch 1909 Accessed through World Register of Marine Species at http www marinespecies org aphia php p taxdetails amp id 575839 on 2011 10 26 Keen M 1971 Sea shells of Tropical West America Marine mollusks from Baja California to Peru 2nd edit Stanford University Press pp 1064 ITIS Odostomia donilla William Healy Dall and Paul Bartsch A Monograph of West American Pyramidellid Mollusks Smithsonian Institution 1909External links editTo USNM Invertebrate Zoology Mollusca Collection To World Register of Marine Species Retrieved from https en wikipedia org w index php title Odostomia donilla amp oldid 1023507544, wikipedia, wiki, book, books, library,