CONTENTS
Flora index
Fauna index
guide to the mangroves of singapore
Molluscs
Peter K L Ng and N Sivasothi (editors)
 
Belongkeng
Family Ellobiidae


These are prominent pulmonate gastropods in mangroves allied to the garden snail.

All are air-breathing, hermaphroditic snails. The shell of one species (Laemodonta punctatostriata, 5 mm) is distinctive in having spiral rows of tiny pits on the shell (hence its Latin name). They can be seens grazing algae on dead logs and stiff mud on the mangrove floor during daytime low tides. Its close relative, L. siamensis, is a slightly larger species (7-8 mm) that is common on soft wet mud.
close-up of empty shells
Apertural views of the
shells of Laemodonta
punctostriata
(left)
and L. cf. siamensis

group of shells on mud
Laemodonta cf. siamensis
(7-8 mm) on mud

group of shells on mud
Laemodonta punctostriata
(about 5 mm)

close-up of living shell
Cassidula sp. covered
with blue-green algae
close-up of living shell showing foot
Ellobium aurisjudae
crawling on a nipah palm
Shell height 4.5 cm

close-up of underside of empty shell
Apertural view of
the shell of
Ellobium aurisjudae
Shell height 4.5 cm

Eliobium aurisjudae
(shell height 4.5 cm), second only to E. aurismidae in size, is found on logs and trees in the back mangroves grazing on epilithic algae.

The smaller but common Cassidula sp. (shell length: 1-2 cm) often has blue-green algae growing on its shell, giving it a beautiful sheen.

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What is mangrove?
Introduction

The Ecosystem

Abiotic
Biotic

Value
Intro
Products
Indirect uses
Potential uses

About Mangroves
in Singapore

History
Mangroves to visit
Conservation
 
From "A Guide to Mangroves of Singapore", Peter K. L. Ng and N. Sivasothi (editors)
Volume 1: The Ecosystem and Plant Diversity and Volume 2: Animal Diversity
Authors: Kelvin K. P. Lim, Dennis H. Murphy, T. Morgany, N. Sivasothi, Peter K. L. Ng,
B. C. Soong, Hugh T. W. Tan, K. S. Tan & T. K. Tan
BP Guide to Nature Series published by the Singapore Science Centre, sponsored by British Petroleum
2001 Raffles Museum of Biodiversity Research, The National University of Singapore & The Singapore Science Centre