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Since the time of the original description there have been no precise locality records in Cambodia of    Bertia   cambojiensis    (Reeve, 1860) and it was believed to be extinct. In 2012, a joint Natural History Museum survey with Vietnamese colleagues rediscovered living populations of this huge sinistral helicoid snail in a protected area of southern Vietnam. The genitalia and radula morphology are re-assessed and type specimens of all recognised congeners are figured herein. The unique morphological characters of this species are a small and simple penis, well-developed amatorial organ complex that incorporates four amatorial organ ducts, a short gametolytic organ complex and spiked papilla, and radula morphology with unicuspid teeth. The type locality of    B.   cambojiensis   , which has been contentious, is determined here to be in the vicinity of ‘Brelum’, Vietnam, near the border with Cambodia. In addition, the nucleotide sequences of barcoding genes  COI , 16SrRNA and  28S  fragments were provided for further comparison.

Notes on the sinistral helicoid snail Bertia cambojiensis (Reeve, 1860) from Vietnam ( Eupulmonata , Dyakiidae )