or Mangrove ear snails
seen? These snails with thick shells are sometimes seen
on leaves and trunks of mangrove trees or on the mud in the back mangroves.
They are sometimes also called Mangrove helmet shell snails. Empty
shells of dead snails are sometimes also washed up on shores near
Features: 1-5cm. Shells thick.
They breathe air (instead of through gills like most other marine
snails) and all lack an operculum to seal the shell opening. Thus,
the shell opening of small ones do resemble an ear.
What do they eat? They graze on
algae and lichen growing on mangrove trees and debris.
Human uses: Large snails are eaten
as traditional and subsistence food in some coastal communities.
Status and threats: The Mangrove
land snail (Ellobium scheepmakeri) is listed as 'Critically
Endangered' on the list of threatened animals of Singapore due to
habitat loss. Like other creatures of the intertidal zone, they are
affected by human activities such as reclamation and pollution. Overcollection
can also have an impact on local populations.
kinds of Belongkeng snails
Pasir Ris, Jun 10
Ellobiidae recorded for Singapore
Siong Kiat and Henrietta P. M. Woo, 2010 Preliminary Checklist
of The Molluscs of Singapore.
Cassidula sp. (Mangrove
Cassidula aurisfelis (Cat's ear mangrove ear snail)
Cassidula nucleus (Banded mangrove
ear snail)=Cassidula mustelina
Ellobium sp. (Belongkeng
Ellobium scheepmakeri (Mangrove
land snail) (CR: Critically endangered)=Ellobium
Pythia sp. (Pythia snail)
- 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, S. K.,
S. H. Tan & M. E. Y. Low. 25 Aug 2009. On Ellobium aurismalchi
(Müller, 1774) (Mollusca: Ellobiidae). Nature in Singapore, 2:
- Tan, K. S.
& L. M. Chou, 2000. A
Guide to the Common Seashells of Singapore. Singapore
Science Centre. 160 pp.
- Wee Y.C.
and Peter K. L. Ng. 1994. A First Look at Biodiversity in Singapore.
National Council on the Environment. 163pp.
G.W. H. and P. K. L. Ng and Ho Hua Chew, 2008. The Singapore
Red Data Book: Threatened plants and animals of Singapore.
Nature Society (Singapore). 285 pp.