Molluscan ResearchISSN 1323-5818
 An international journal of the Malacological Society of Australasia and 
the Society for the Study of Molluscan Diversity published by Magnolia Press

0Home | About Molluscan Research | Online content | Editorial committee | Information for authors | How to order | Links0

Molluscan Research 29(3): 121-146; published 30 Sept. 2009
Copyright © The Malacological Society of Australasia & the Society for the Study of Molluscan Diversity

Exploring a largely unknown fauna: On the diversity of pachychilid freshwater gastropods in Vietnam (Caenogastropoda: Cerithioidea)

1 Corresponding author. Museum für Naturkunde, Humboldt-Universität, Invalidenstr. 43, 10115 Berlin, Germany. Current address: Australian Museum, 6 College Street, Sydney NSW 2010, Australia. Email:
2 The City University of New York, York College and CUNY Graduate Center, New York, USA.
3 Vietnamese Academy of Science and Technology, Institute of Ecology and Bio-Resources, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.


A revision of Vietnamese freshwater gastropods of the family Pachychilidae is presented based on the analysis of morphological characteristics and partial sequences of the mitochondrial genes of 16S rRNA (16S) and cytochrome c oxidase subunit I (COI). We found that in Vietnam two pachychilid genera occur, Brotia and Sulcospira. Of the eight to fifteen species reported by earlier authors, we can only confirm the presence of two species, Sulcospira tonkiniana and S. tourannensis. All further taxonomic names that were previously applied for Vietnamese pachychilids are considered as junior synonyms of these two species or erroneous references to species from other regions of Southeast and South Asia. Additionally, we describe two new species of Brotia, four new species of Sulcospira, and report another undescribed species with uncertain affinities. Patterns of morphological and genetic differentiation of the Vietnamese species and their affinities within the context of pachychilid phylogeny are briefly discussed.

Key words: Brotia, Sulcospira, Adamietta, taxonomy, systematics, phylogeny, morphology, midgut

Full article (PDF; 1830 KB)

Related series by publisher
Zootaxa: Mollusca
Taxonomic papers and monographs on Mollusca from all over the world
Collected papers on all branches of zoology; vol. 1 on Mollusca
Copyright © 2005-2009 Magnolia Press Published : 30 Sept. 2009