Anthropogenic removal of natural dispersal barriers and modification of natural habitats have contributed to the spread of non-native species. Potential invaders that are cryptic in appearance and/or behaviour are particularly troublesome as this confounds efforts to detect or manage incipient invasions. Here we report one such invader, the Florida serrate crownsnail, Pyrgophorus platyrachis Thompson, 1968, in Singapore reservoirs—only the first record outside the Americas. We identified P. platyrachis using morphological and molecular techniques. The Singapore COI mitochondrial sequences were 99-100% matched to P. platyrachis from Florida, USA, while the 16S sequences are the first published for this species, and were most closely matched to another confamilial species.
Bibliographical noteWe would like to thank two anonymous reviewers and Kit Magellan for their helpful comments that greatly improved the manuscript. We would also like to thank SK Tan and W Ponder who contributed to identifying the species; R Meier who contributed material and equipment for molecular analysis; WH Wong and WY Wang for assistance with molecular analysis; JTB Kwik, ML Chen, YYW Kwang, RBH Lim, WQ Ng, EZY Chua, JEY Su, PKL Song, JZY Song, TYH Low, J Chan, A Kurup and EH Tan for help in collecting the specimens; YC Ang for photographing specimens. We thank the National Parks Board and Public Utilities Board for providing relevant research permits, and reservoir managers and staff for logistical support in the field. We acknowledge financial support from the Department of Biological Sciences of the National University of Singapore, the National Research Foundation and the Economic Development Board (SPORE, COY-15-EWI-RCFSA/N197-1), Wildlife Reserves Singapore Ah Meng Memorial Conservation Fund (National University of Singapore(NUS) grant number R-154-000-617-720), and the Public Utilities Board (National University of Singapore(NUS) grant number R-154-000-619-490).
- DNA barcoding
- Introduced species