RISSOIDAE

  Rissoina bertholleti
Issel, 1869

Relevant Synonyms
-

Misidentification
-

 photo: S. Gofas / Coll. B. Galil    

SHORT DESCRIPTION
Shell elongated, thick, high-spired, of 7-8 moderately convex whorls. Sculpture of spire whorls of very strong, slightly oblique axial ribs; on the body whorl, those ribs are abruptly interrupted; there is a thick cord running over the abapical end of the body whorl, separated from the ribs by a depressed spiral furrow. Aperture oval, with a thickened outer lip, smooth inside, and a broadly open, shallow notch at its abapical end.

color : whitish with a blurry brown suprasutural band, fading out on the body whorl.

common size : 6-10 mm.

DISTINGUISHING CHARACTERISTICS
This species is easily recognized by the deep furrow interrupting the ribs abapically, whereas in the native Rissoina bruguierei these ribs fade out gradually.

BIOLOGY / ECOLOGY
Unknown.

habitat : unknown.


1st Mediterranean record
Israel, 1973 [1965].


DISTRIBUTION
Worldwide: Red Sea and Indian Ocean. Mediterranean: recorded first in 1965 in Israel, from 'Atlit to Dor (Barash and Danin, 1973); successively from Cyprus (Bogi et al., 1989) and southeast coast of Turkey, from Gulf of Iskenderun to Tasuçu (Enzenross et al., 1990).

ESTABLISHMENT SUCCESS
Relatively rare.

speculated reasons for success :
-


MODE OF INTRODUCTION
Possibly via the Suez Canal.


IMPORTANCE TO HUMANS
None.


KEY REFERENCES

  • Barash A. and Danin Z., 1973. The Indo-Pacific species of Mollusca in the Mediterranean and notes on a collection from the Suez Canal. Israel Journal of Zoology, 21(3-4): 301-374.
  • Bogi C. , Cianfanelli S. and Talenti E., 1989. La malacofauna dell'Isola di CIpro. Atti Prima Giornata di Studi Malacologici CISMA, 187-214.
  • Enzenross L., Enzenross R. and Niederhöfer H.J., 1990. Wissenschaflich interssante Funde aus der Sammlung Enzenross (marine Invertebraten). Jahreshefte der Gesellschaftten fuer Naturkunde in Wuerttemberg, 145: 283-294.

 

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Last update : January 2005

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