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Journal of Molluscan Studies 2005 71(4):379-391; doi:10.1093/mollus/eyi040
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© The Author 2005. Published by Oxford University Studies on behalf of The Malacological Society of London, all rights reserved

ROBERTSIELLA SILVICOLA, A NEW SPECIES OF TRICULINE SNAIL (CAENOGASTROPODA: POMATIOPSIDAE) FROM PENINSULAR MALAYSIA, INTERMEDIATE HOST OF SCHISTOSOMA MALAYENSIS (TREMATODA: DIGENEA)

S. W. ATTWOOD1, H. S. LOKMAN2 and K. Y. ONG2

1Wolfson Wellcome Biomedical Laboratories, Department of Zoology, The Natural History Museum, London SW7 5BD, UK; and 2Infectious Diseases Research Centre, Institute for Medical Research, Jalan Pahang, 50588 Kuala Lumpur, Malaysia

Correspondence: S. W. Attwood; e-mail: s.attwood{at}nhm.ac.uk

A new species of pomatiopsid gastropod, Robertsiella silvicola, is described from Perak, peninsular Malaysia. The encapsulation of the ducts of the bursa copulatrix complex, short (wide) spermathecal duct and penial stylet indicate that this is a species of Robertsiella. Robertsiella silvicola is distinguished from other Robertsiella by its small size, the lack of pronounced spiral macrosculpture on the shell, and the nature of the stylet. Robertsiella silvicola is found in water bodies ranging from small, spring-fed, first-order streams to tiny trickles of water draining off forested hillsides. This species appears restricted to limestone areas in the foothills of the mountain chains of Kedah and Perak States, West Malaysia. It appears to be a highly compatible intermediate host for the parasitic blood fluke Schistosoma malayensis Greer, Ow-Yang & Yong, 1980 that infects humans and other mammals in Malaysia.

(Received 15 September 2004; accepted 21 March 2005)


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