Ividia armata

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Ividia armata
Odostomia armata 001.png
Apertural view of the shell of Ividia armata
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Family: Pyramidellidae
Genus: Ividia
Species:
I. armata
Binomial name
Ividia armata
Carpenter, 1856 [1]
Synonyms
  • Odostomia armata Carpenter, 1856
  • Odostomia (Miralda) armata Carpenter, 1856
  • Parthenia armata Carpenter, 1856

Ividia armata is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. [2] [3]

Contents

Description

The elongate-conic shell is white. Its length measures 2.5 mm. The two whorls of the protoconch are deeply, obliquely immersed in the first of the succeeding turns. The six whorls of the teleoconch are marked by two strongly elevated tuberculate keels between the sutures, the posterior one of which is about twice as wide as its neighbor. Of the crenulations about 20 appear upon the second and third, 22 upon the fourth, and 24 upon the penultimate turn. The sutures are strongly channeled. The periphery is marked by a slender keel, while the base has two a little weaker than the peripheral one which divides the space between this and the umbilical area into three equal parts. The aperture is ovate. The outer lip is thin. The columella is rather thick, reflected and provided with a slender fold at its insertion. The parietal wall is provided with a thin callus. [4]

Distribution

The type specimen was found in the Pacific Ocean off Mazatlán, Mexico.

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References

  1. ↑ Carpenter, Mazat. Cat., 415, 1857
  2. ↑ Ividia armata (Carpenter, 1857) . Retrieved through: World Register of Marine Species  on 3 January 2019.
  3. ↑ Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064:
  4. ↑ William Healy Dall and Paul Bartsch, "A Monograph of West American Pyramidellid Mollusks", Smithsonian Institution, 1909
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