Mitra (Strigatella) retusa   Lamarck,  1822 (Sea Snail)
Organism information awaits expert curation
Class: Gastropoda

Image copyrights: Suduiraut

Size: 30 mm.

Color: Reddish-brown to dark brown in color, ornamented with close-set or wide-spaced, wavy longitudinal lines which usually terminate as small spots basally, the axial lines are crossed by a white peripheral line on the body whorl, but this line may become obsolete and visible only as slightly thickened spots on the axial lines. The aperture is dark mauve or purple-brown in fresh specimens and becomes paler towards the interior, the columella is brown or purple-brown and the folds and parietal callus are light violet. The periostracum is thin, brown, moderately translucent and finely longitudinally striate.

Shell about 1 1/4 inches in length, elongate-ovate to cylindrically-ovate, heavy and solid, sutures distinct and narrowly incised, body whorl long. Whorls 5-7, apart from an eroded protoconch, spire whorls convex and usually roundly angulate at the sutures on the last 2 whorls, sculptured with fine, shallow and punctate spiral grooves which number from 3-5 on the penultimate and from 10-22 on the body whorl; the spiral grooves are frequently obsolete on the posterior of the body whorl, but are usually pronounced as wide-spaced spiral cords on the lower half of the body whorl. Aperture longer than the spire, very narrow and smooth within, outer lip prominently thickened, constricted and slightly thickened on the interior margin of the outer lip, which is also prominently crenulate. Columella calloused, and with 4-5 strong, oblique folds, parietal wall with a small callus-pad in senile individuals, siphonal fasciole straight, siphonal notch moderately distinct.

Synonym (s)
Mitra lineata Kuster, 1841
Mitra virgata Reeve, 1844
Mitra tornatelloides Reeve, 1845
Strigatella paupercula Lamarck, 1880
Mitra amanda Bartsch, 1918
Mitra signa Bartsch, 1919
Strigatella retusa Lamarck, 1965

Common Name (s)
Economic Importance and Threats

Habitat:  Reef Associated, Rocky, Coastal


• 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, Andamans INDIA
• Andaman and Nicobar Islands, Katchall INDIA

Literature Source(s)
  • 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 -
  • Cernohorsky, WO (1973) The Mitridae of the World Indo-Pacific Mollusca Delaware Museum of Natural History Grenville, Delaware, U.S.A 3(17) 273-528 Available at - NIO, Goa
  • Eddie, H Hardy's internet guide to marine gastropods 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:2012-07-16

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