Abstract
Correcting misidentifications and first confirmation of the globally-invasive Physa acuta Draparnaud, 1805 (Gastropoda: Physidae) in Thailand and Laos
Highlights
Almost 300 species of freshwater gastropods are found in Thailand (Brandt 1974; Nabhitabhata 2009), but in the monograph that is still considered the main authority on freshwater molluscs for Southeast Asia, Brandt (1974) only listed Amerianna carinata (H Adams, 1861) as being introduced
The most notorious invasive freshwater snails in Thailand are the South American Ampullariidae, Pomacea canaliculata (Lamarck, 1822) and Pomacea maculata Perry, 1810, which were the focus of intensive research in the 1990s because of the extensive damage they caused to rice fields (Keawjam and Upatham 1990; Halwart 1994; Chanyapate and Archavakom 1999; Cowie et al 2017)
One species that may have been introduced into Malaysia and Singapore via the ornamental pet trade is Physa acuta Drapranaud, 1805, but it was misidentified as Physastra sumatrana (Martens, 1897) for many years
Summary
Almost 300 species of freshwater gastropods are found in Thailand (Brandt 1974; Nabhitabhata 2009), but in the monograph that is still considered the main authority on freshwater molluscs for Southeast Asia, Brandt (1974) only listed Amerianna carinata (H Adams, 1861) as being introduced. The most notorious invasive freshwater snails in Thailand are the South American Ampullariidae, Pomacea canaliculata (Lamarck, 1822) and Pomacea maculata Perry, 1810, which were the focus of intensive research in the 1990s because of the extensive damage they caused to rice fields (Keawjam and Upatham 1990; Halwart 1994; Chanyapate and Archavakom 1999; Cowie et al 2017). Other than these species, only one freshwater snail, Gundlachia sp. One species that may have been introduced into Malaysia and Singapore via the ornamental pet trade is Physa acuta Drapranaud, 1805, but it was misidentified as Physastra sumatrana (Martens, 1897) for many years (see Ng et al 2015b)
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