Nerita (Ritena) costata   Gmelin,  1791 (Sea Snail)
Organism information awaits expert curation
Class: Gastropoda

Shell Size: 32 mm in height.

Color: Columellar area white often with an yellowish tinge on the callus, inner side of outer lip glistening white.

Shell of medium size, globose and solid, spire obtusely flattened, but with distinct conical apex, sutures indistinct. Aperture crescentic, small compared to the size of the shell, columellar area convex, columellar callus dips steeply inwards towards the aperture, surface wrinkled with ribs continuing on to the callus, columellar margin with four strong and broad teeth, the central two more prominent than the one on either side, outer lip thickened, slopes gradually inside, with seven strong teeth. Sculptured with 12 to 16 regular, strong, round, broad and conspicuously black spiral ribs with very thin axial striae, interstices neatly excavated. Operculum somewhat thin, concave, externally gray, rib strong and curved, with striations, peg reduced.

Synonym (s)

Common Name (s)
Economic Importance and Threats

Habitat:  Rocky


• Andaman and Nicobar Islands, Andaman (Lat: 10) (Long: 93) INDIA
• Andaman and Nicobar Islands, Nicobar Islands (Lat: 7) (Long: 93) INDIA
• Lakshadweep (Lat: 8) (Long: 75) INDIA
• Andhra Pradesh, Visakhapatnam 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 -

Page last updated on:2010-07-16

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