Clithon oualaniensis   Lesson,  1831 (Sea Snail)
Organism information awaits expert curation
Class: Gastropoda

Size: 1 cm.

Color: Bright and extremely variable, usually shades of yellow or green, with darker, sometimes black, bands or axial streaks, often with a network pattern of triangular marks.

Ovate, thin-shelled, spire low, surface glossy smooth, columellar deck weakly arched, smooth except for one large and several small teeth along the margin, teeth irregular and sometimes obscure. The whorls of the spire are imperfectly developed. The columellar area is covered by a thin callus layer. The operculum is calcareous 'D' shaped plate with a brownish margin and an apophysis. Polymorphism in shell coloration is well known in this snail.

Synonym (s)
Neritina (Smaragdia) joulaniensis Gravely, 1942
Neritina oualaniensis Lesson, 1831
Smaragdia oualaniensis Crichton, 1941
Neritina oualanensis Reeve, 1855
Neritina ualanensis von Martens, 1878
Neritina ualanensis Schepman, 1908
Neritina (Smaragdia) oulaniensis Gravely, 1942
Clithon oualaniensis Rajagopal and Mookherjee, 1978

Common Name (s)
Economic Importance and Threats

Habitat:  Estuarine, Coastal


• Tamil Nadu, Parangipettai Coast INDIA
• Orissa, Arakuda INDIA (Record: 1977, 25/12/1977)
• Orissa, Brahmagiri INDIA (Record: 1984, 21/02/1984)
• Orissa, Kusabhadra River mouth INDIA (Record: 02/12/1977)
• Orissa, Gopalpur INDIA (Record: 29/12/1977)
• Andhra Pradesh, Bimlipatam INDIA
• Andhra Pradesh, Godavari Estuary INDIA
• Tamil Nadu, Vellar Estuary INDIA
• Tamil Nadu, Mandapam INDIA
• Tamil Nadu, Rameswaram INDIA
• Kerala, Kollam INDIA
• Karnataka, Netravati River mouth INDIA
• Karnataka, Mangalore INDIA
• Karnataka, Murdeswar INDIA
• Karnataka, Kodibag INDIA
• Andaman and Nicobar Islands INDIA
• Tamil Nadu, Kundugal Point INDIA

Literature Source(s)
  • Rajagopal, S; Khan, SA; Srinivasan, M and Shanmuqam, A (1998) Gastropods of Parangipettai coast Annamalai University, Parangipettai 608 502 13516 Available at - NCL, Pune
  • Wilson, B; Wilson, C and Baker, P (1993) Australian marine shells 1 1-408 Available at - NIO, Goa
  • Rajagopal, S; Khan, SA; Srinivasan, M and Shanmugam, A (1998) Gastropods of Parangipettai coast Annamalai University 38 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Rao, NVS; Rao, KVS and Manna, RN (1995) Mollusca Wetland ecosystem series 1: Fauna of Chilka lake ZSI, Calcutta 391-468 Available at - NIO, Goa
  • Tan, SK and Clements, R (2008) Taxonomy and distribution of the Neritidae (Mollusca: Gastropoda) in Singapore Zoological Studies 47(4) 481-494 Available at -
  • Rao, NVS; Rao, KVS and Maitra, S (1991) Marine molluscs State fauna series 1: Fauna of Orissa Zoological Survey of India, Calcutta Part 3 1-175 Available at - NIO, Goa

Page last updated on:2010-06-15

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