Nerita (Ritena) grayana   Recluz,  1843 (Sea Snail)
Organism information awaits expert curation
Class: Gastropoda

Shell size: 39 mm in height.

Color: Grayish black flecked with white, apex white, aperture light yellow, outer lip flecked with black. Operculum gray with white nucleus, internal surface also grayish.

Shell of medium size, ovately globose and thick, spire short but distinct and elevated, apex pointed. Aperture proportionately larger, columellar callus slopes deeply inwards, with strong wrinkles-uninterrupted in the upper half but shorter and scantly set in lower half-columellar margin concave with two to four strong and blunt teeth, a ridge-like elevation on the posterior side, outer lip moderately thickened, with a callosity on the interior bearing 19 to 20 small teeth. Sculptured with strong, exalted and crenulated spiral ribs, numbering 24 to 30, on the upper half of the whorl strong ribs enclose thin ribs between them, interspaces broader than the ribs.

Synonym (s)

Common Name (s)
Economic Importance and Threats



• Andaman and Nicobar Islands, Andaman (Lat: 10) (Long: 93) INDIA
• Andaman and Nicobar Islands, Nicobar Islands (Lat: 7) (Long: 93) INDIA
• Andaman and Nicobar Islands, Chidiya Tapu INDIA
• Andaman and Nicobar Islands, Camorta INDIA
• Andaman and Nicobar Islands, Nancowry Island (Lat: 7.98) (Long: 93.53) INDIA

Literature Source(s)
  • Arrow, GJ (1910) The fauna of India including Ceylon and Burma. Coleoptera Taylor and Francis, Red Lion Court, Fleet Street 322 pp
  • Daniel, R (1985) Fauna of India and the adjacent countries (Coelenterata: Hydrozoa: Siphonophora) ZSI 440 pp Available at - NIO, Goa
  • Subba Rao, NV (2003) Indian seashells Records of the Zoological Survey of India ZSI, Kolkata (Part 1) 416 pp Available at - NCL, Pune
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Subba Rao, NV and Dey, A (2000) Catalogue of marine molluscs of Andaman and Nicobar Islands Occasional paper no 187 Records of the Zoological Survey of India ZSI 1-323 Available at - NCL, Pune

Page last updated on:2012-06-29

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