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Phylum Mollusca > Class Gastropoda > Family Calyptraeidae
Conical slipper snail
Desmaulus extinctorium
Family Calyptraeidae
updated Jul 2020

Where seen? This snail is often seen on the a shell occupied by a hermit crab, usually on the outside of the shell. It is not seen as often as the Flat slipper snail, which is white and usually found on the inside of the shell. It was previously known as Calyptraea extinctorium.

Features: 1-2cm. The shell is thin, usually forming a pointed conical shape. May be white, pinkish or even reddish, with fine lines.

Sometimes confused with limpets which are also gastropods but which can move about. Here's more on how to tell apart limpets, slipper snails and similar animals.

Conical slipper snails on the outside of the shell. Flat slipper snails on the inside.
Changi, Apr 05

Conical slipper snail on the outside.
Changi, Jul 10

Chek Jawa, Sep 10

On a shell occupied by a hermit crab

On a living scallop.
Changi, Aug 18

Conical slipper snails on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores

Growing on a living Window pane shell clam.
Changi East, Dec 12
Photo shared by Marcus Ng on flickr.


  • Tan Siong Kiat and Henrietta P. M. Woo, 2010 Preliminary Checklist of The Molluscs of Singapore (pdf), Raffles Museum of Biodiversity Research, National University of Singapore.
  • Tan, K. S. & L. M. Chou, 2000. A Guide to the Common Seashells of Singapore. Singapore Science Centre. 160 pp.
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