Zafrona isomella
Shell of Zafrona isomella
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Buccinoidea
Family: Columbellidae
Genus: Zafrona
Species:
Z. isomella
Binomial name
Zafrona isomella
(Duclos, 1840)
Synonyms[1]
  • Anachis (Zafrona) isomella (Duclos, 1840)
  • Anachis retiaria (Tomlin, 1931)
  • Caducifer nebulosus (A. Gould, 1860) (junior subjective synonym)
  • Colombella isomella Duclos, 1840
  • Columbella (Anachis) nebulosa A. Gould, 1860 (superseded combination)
  • Columbella isomella Duclos, 1840 (original combination)
  • Columbella isomella var. notata Hervier, 1900
  • Columbella isomella var. transversa Hervier, 1900
  • Columbella nebulosa A. Gould, 1860 (junior subjective synonym)
  • Columbella striatula var. immaculata Hervier, 1900
  • Columbella striatula var. lineolata Hervier, 1900
  • Columbella striatula var. rubicunda Hervier, 1900
  • Columbella striatula var. subcarnea Hervier, 1900
  • Columbella striatula var. sulphurea Hervier, 1900
  • Pleurotoma (Defrancia) grisea E. A. Smith, 1884
  • Pleurotoma grisea E. A. Smith, 1884

Zafrona isomella is a species of sea snail, a marine gastropod mollusk in the family Columbellidae, the dove snails.[1]

Description

The length of the shell attains 5 mm, its diameter 1.5 mm.

(Described as Pleurotoma (Defrancia) grisea) The very small shell is subfusiformly ovate. It is grey or dirty white, sometimes spotted with brown below the suture, or exhibiting one or two pale or whitish spiral lines.

The shell contains eight whorls. The first 4½ are white, smooth, glossy, convex and non -perpendicular with the axis of the shell. The rest are granosely finely costate and transversely lirate and slightly convex at the sides. There are about eighteen ribs on a whorl, hardly as broad as the interstices. The lirae are finer than the ribs, six on the upper whorls and about twenty on the body whorl. The aperture is small, narrow and terminates anteriorly in a short, oblique, recurved siphonal canal. The columella is covered with a callus bearing two small tubercles just below the middle. The outer lip is externally thickened with a broadish varix, faintly sinuated above near the suture, armed within with seven strong lirae.[2]

Distribution

This marine species occurs off Réunion, the Philippines,

References

  • Drivas, J.; Jay, M. (1990). The Columbellidae of Réunion Island (Mollusca: Gastropoda. Annals of the Natal Museum. 31: 163–200.
  • eMaintenon, M. (2008). Results of the Rumphius Biohistorical Expedition to Ambon (1990). Part 14. The Columbellidae (Gastropoda: Neogastropoda) collected at Ambon during the Rumphius Biohistorical Expedition. Zoologische Mededelingen. 82(34):341-374
  • Kilburn R.N. & Marais J.P. (2010) Columbellidae. pp. 60–104, in: Marais A.P. & Seccombe A.D. (eds), Identification guide to the seashells of South Africa. Volume 1. Groenkloof: Centre for Molluscan Studies. 376 pp.
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