Rissoa

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Genus of gastropods

title: "Rissoa" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["rissoa", "gastropod-genera"] description: "Genus of gastropods" topic_path: "general/rissoa" source: "https://en.wikipedia.org/wiki/Rissoa" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of gastropods ::

|image = Rissoa janusi 001.jpg |image_caption = Shell of Rissoa janusi |taxon = Rissoa |authority = Freminville in Desmarest, 1814 |synonyms_ref = |synonyms =

  • Apicularia Monterosato, 1884
  • Elatiella Nordsieck, 1972
  • Goniostoma Villa, 1841
  • Gueriniana Nordsieck, 1972
  • Lamarckia Leach, 1852
  • Liavenustia Nordsieck, 1972
  • Lilacinia Nordsieck, 1972
  • Loxostoma Bivona-Bernardi, 1838
  • Persephona Leach, 1852
  • Rissoia Bronn, 1848
  • Rissostomia G.O. Sars, 1878
  • Sabanea Monterosato, 1884
  • Schwartzia Bucquoy, Dautzenberg & Dollfus, 1884
  • Sfaxiella Nordsieck, 1972
  • Turboella Leach, 1847
  • Zippora Leach, 1852 |type_species = Rissoa ventricosa |type_species_authority = Desmarest, 1814 |subdivision_ranks = Species |subdivision = See text

Rissoa is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae.

The genus was first introduced by M. de Freminville for some small shells observed by M. Antoine Risso, a distinguished naturalist of Nice, France. They were described by M. Demarest in 1814 in the "New Bulletin of the Philomatic Society".

Description

The soft body of the snail is elongated and spiral. The somewhat prolonged mouth has a proboscis. The tentacles are awl-shaped with the eyes on a small prominence near the base. The foot is oval or elliptical. The species is phytophagous.

The conical shell has an elongated spire with its apex nipple-shaped. The size of the shell varies between 1 mm and 8 mm. The whorls are generally convex-shaped with a distinct suture. The aperture is ovate, roundish or pear-shaped with its anterior end rounded, the posterior end acute and with the peristome complete. The thin and horny operculum is spirally marked and equally ovate, roundish or pear-shaped.

Habitat

This species can be found on brown algae (genus Fucus), in clefts of rocks, on stones, on mud or sand. Most will be found on sandy beaches along the line of the last tide.

Species

Species within the genus Rissoa include:

Synonyms

References

  • Nordsieck, F. (1972). Die europäischen Meeresschnecken (Opisthobranchia mit Pyramidellidae; Rissoacea). Vom Eismeer bis Kapverden, Mittelmeer und Schwarzes Meer. Gustav Fischer, Stuttgart. XIII + 327 pp.
  • Vaught, K.C. (1989). A classification of the living Mollusca. American Malacologists: Melbourne, FL (USA). . XII, 195 pp.
  • Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180–213

References

  1. {{WRMS species. 138456. ''Rissoa'' Freminville in Desmarest, 1814
  2. [https://archive.org/stream/histmolluscous00macgrich#page/146/mode/2up Macgillivray, William, History of the molluscous animals of Scotland, London, 1844]
  3. {{WRMS species. 141343. ''Rissoa aartseni'' Verduin, 1985. 9 August 2010
  4. {{WRMS species. 141344. ''Rissoa albugo'' Watson, 1873. 9 August 2010
  5. {{WRMS species. 141345. ''Rissoa alleryi'' (Nordsieck, 1972). 9 August 2010
  6. {{WRMS species. 141346. ''Rissoa angustior'' (Monterosato, 1917). 9 August 2010
  7. {{WRMS species. 141347. ''Rissoa auriformis'' Pallary, 1904. 9 August 2010
  8. {{WRMS species. 141348. ''Rissoa auriscalpium'' (Linnaeus, 1758). 9 August 2010
  9. {{WRMS species. 141349. ''Rissoa decorata'' Philippi, 1846. 9 August 2010
  10. {{WRMS species. 234201. ''Rissoa euxinica'' Milaschevich, 1909. 9 August 2010
  11. {{WRMS species. 141350. ''Rissoa frauenfeldiana'' Brusina, 1868. 9 August 2010
  12. {{WRMS species. 141351. ''Rissoa gemmula'' Fischer P. in de Folin, 1869. 9 August 2010
  13. {{WRMS species. 141352. ''Rissoa gomerica'' (Nordsieck & Talavera, 1979). 9 August 2010
  14. {{WRMS species. 141353. ''Rissoa guerinii'' Récluz, 1843. 9 August 2010
  15. {{WRMS species. 141354. ''Rissoa guernei'' Dautzenberg, 1889. 9 August 2010
  16. {{WRMS species. 141355. ''Rissoa italiensis'' Verduin, 1985. 9 August 2010
  17. {{WRMS species. 141356. ''Rissoa janusi'' (Nordsieck, 1972). 9 August 2010
  18. {{WRMS species. 141357. ''Rissoa lia'' (Monterosato, 1884). 9 August 2010
  19. {{WRMS species. 141358. ''Rissoa lilacina'' Récluz, 1843. 9 August 2010
  20. {{WRMS species. 141359. ''Rissoa membranacea'' (Adams J., 1800). 9 August 2010
  21. {{WRMS species. 180959. ''Rissoa mirabilis'' Manzoni, 1868. 9 August 2010
  22. {{WRMS species. 141360. ''Rissoa monodonta'' Philippi, 1836. 9 August 2010
  23. {{WRMS species. 141361. ''Rissoa multicincta'' (Smriglio & Mariottini, 1995). 9 August 2010
  24. {{WRMS species. 141362. ''Rissoa multicostata'' (Nordsieck & Talavera, 1979). 9 August 2010
  25. {{WRMS species. 141363. ''Rissoa panhormensis'' Verduin, 1985. 9 August 2010
  26. {{WRMS species. 141364. ''Rissoa paradoxa'' (Monterosato, 1884). 9 August 2010
  27. {{WRMS species. 141365. ''Rissoa parva'' (da Costa, 1778). 9 August 2010
  28. {{WRMS species. 141366. ''Rissoa pseudoguerini'' (Nordsieck & Talavera, 1979). 9 August 2010
  29. {{WRMS species. 141367. ''Rissoa rodhensis'' Verduin, 1985. 9 August 2010
  30. {{WRMS species. 141368. ''Rissoa scurra'' (Monterosato, 1917). 9 August 2010
  31. {{WRMS species. 141369. ''Rissoa similis'' Scacchi, 1836. 9 August 2010
  32. {{WRMS species. 141370. ''Rissoa splendida'' Eichwald, 1830. 9 August 2010
  33. {{WRMS species. 141371. ''Rissoa torquilla'' Pallary, 1912. 9 August 2010
  34. {{WRMS species. 141372. ''Rissoa variabilis'' (Von Mühlfeldt, 1824). 9 August 2010
  35. {{WRMS species. 141373. ''Rissoa ventricosa'' Desmarest, 1814. 9 August 2010
  36. {{WRMS species. 458213. ''Rissoa verdensis'' Rolán & Oliveira, 2008. 9 August 2010
  37. {{WRMS species. 234202. ''Rissoa vicina'' Milaschevich, 1909. 9 August 2010
  38. {{WRMS species. 141374. ''Rissoa violacea'' Desmarest, 1814. 9 August 2010
  39. {{WRMS species. 154011. ''Rissoa interrupta'' (J. Adams, 1800). 9 August 2010
  40. {{WRMS species. 153669. ''Rissoa porifera'' (Lovén, 1843). 9 August 2010
  41. {{WRMS species. 154041. ''Rissoa rufilabrum'' Alder. 9 August 2010
  42. {{WRMS species. 153738. ''Rissoa sarsii'' Lovén, 1846. 9 August 2010

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rissoagastropod-genera