Lambis truncata

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Lambis truncata
Lambis truncata 01.JPG
Five views of a shell of Lambis truncata
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda
clade Hypsogastropoda
clade Littorinimorpha
Superfamily: Stromboidea
Family: Strombidae
Genus: Lambis
Species: L. truncata
Binomial name
Lambis truncata
(Humphrey, 1786)
  • Lambis bryonia Gmelin, 1791
  • Pterocera bryonia (Gmelin, 1791)
  • Strombus truncatus [Lightfoot], 1786 (basionym)

Lambis truncata, common name the giant spider conch, is a species of sea snail, a marine gastropod mollusk in the family Strombidae, the true conchs.[1]


A shell of Lambis truncata truncata
A shell of Lambis truncata sebae

Subspecies of Lambis truncata include:

  • Lambis truncata truncata (Humphrey, 1786)[1]
  • Lambis truncata sebae (Kiener, 1843)[1]

Lambis truncata truncata has a flat apex, while the apex of Lambis truncata sebae is more pointed.


A colored drawing of Lambis truncata from Kiener, 1843, depicting both the shell and soft parts

Lambis truncata is the largest and heaviest of spider shells, up to 40 cm.[1] Lambis truncata is similar to Lambis lambis but with a more squarish outline.[1] Younger shells are creamy white; columella and lip usually mauve brown when older.[1]


The distribution of Lambis truncata includes the Indian Ocean off [1] Aldabra, Chagos, Madagascar, Mauritius, Tanzania; the Bay of Bengal and in the Pacific Ocean along the Philippines.


Lambis truncata lives on rubble and coarse sand in shallow water.[1]


This article incorporates CC-BY-SA-3.0 text from the reference.[1]

  1. ^ a b c d e f g h i j Lambis truncata (Humphrey, 1786). WoRMS (2009). Lambis truncata (Humphrey, 1786). Accessed through the World Register of Marine Species at on 27 June 2010.
  • Dautzenberg, Ph. (1929). Mollusques testacés marins de Madagascar. Faune des Colonies Francaises, Tome III
  • Spry, J.F. (1961). The sea shells of Dar es Salaam: Gastropods. Tanganyika Notes and Records 56
  • Walls, J.G. (1980). Conchs, tibias and harps. A survey of the molluscan families Strombidae and Harpidae. T.F.H. Publications Ltd, Hong Kong

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