Odostomia pulchra

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

Odostomia pulchra
Apertural view of the shell of Odostomia pulchra
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
Superfamily:
Pyramidelloidea
Family:
Pyramidellidae
Genus:
Odostomia
Species:
O. pulchra
Binomial name
Odostomia pulchra
(de Folin, 1872) [1]
Synonyms[2]
  • Chrysallida pulchra (de Folin, 1872)
  • Noemia pulchra de Folin, 1872 (basionym)
  • Odostomia (Chrysallida) pulchra ( de Folin, 1872)

Description

The white shell is ovate, conic, subvitreous, and shining. It measures 2.2 mm. The 1½ whorls of the protoconch are obliquely immersed in the first of the succeeding turns. The 4½ whorls of the teleoconch are well rounded. They are marked by four spiral cords between the sutures and equally strong axial ribs, of which 14 occur upon the second, 16 upon the third, and 18 upon the penultimate turn. The sutures are well impressed. The periphery of the body whorl is marked by a slender channel. The base of the shell is well rounded. It is marked by four subequal, broad, rounded keels, the spaces between which are marked by slender riblets. The aperture is almost pear-shaped. The posterior angle is obtuse. The outer lip thin, showing the external sculpture within. The columella is slender, strongly curved, decidedly reflected, and provided with a weak fold at its insertion.[4]

Distribution

This species occurs in the Pacific Ocean off Margarita Island, Bay of Panama.

References
  1. de Folin, Fonds de la Mer, vol. 2, 1872, p. 165, pl. 6, fig. 2
  2. WoRMS (2011). Odostomia pulchra (De Folin, 1872). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575894 on 2011-11-10
  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. Dall & Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p. 158-159; 1909
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