IUCN threat status:

Least Concern (LC)

Distribution

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Range Description

The species' native distribution is tropical and subtropical South America, including the Amazonas and the Plata basins; the southernmost record for the species is the Paso de las Piedras reservoir south of Buenos Aires province, and recently in Northern Patagonia: Balneario La Herradua, near the Limay River, province of Neuquén, Argentina (Darrigran et al. 2011). The species is the southernmost applesnail in the world (Estebenet and Martín 2002).

This species is an introduced species and is considered to be one of the worst invaders in recent time in the southeast Asian region. It has mostly been introduced in this region as a food item (Cowie 2002). It has been found in Taiwan since between 1979 and 1981 (Cowie 2002), in Japan since 1981 (Fujio et al. 1991), in the Philippines since either 1980 or 1982 (Mochida 1991, Anderson 1993, Halwart 1994), in southern China since 1981 (Cowie 2005, Shan et al. 2009), and has also been introduced to Korea (probably 1986), Sarawak and Peninsular Malaysia (1987), the Indonesian islands of Java and Sumatra (1989), Thailand (1989), Viet Nam (1988 or 1989) and Laos (1992) (Cowie 2002), as well as Hong Kong (Laup 1991), Cambodia (Cowie 1995), Singapore (Ng et al. 1993), Guam (Smith 1992, Eldredge 1994), Papua New Guinea (Laup 1991, Eldredge 1994), and Sri Lanka (Cowie 2005). The species has subsequently become a serious rice pest in much of the region - in the Philippines it is considered the number one rice pest and has caused huge economic losses (Cowie 2005).The species has also been introduced to North America; into canals and ditches in southeast Florida (Thompson 1997, 1999), Texas, central Ohio (Ghesquiere 2001), North Carolina, Virginia (United States Geological Survey 2011), the Dominican Republic (Cowie 2005), Georgia (NatureServe 2009), Langan Park and Three Mile Creek in Mobile, Alabama (D. Shelton pers. comm. in United States Geological Survey 2011), a pond bordering the Mobile-Tensaw River Delta in Baldwin County, Alabama (United States Geological Survey 2011), Lake Miramar in San Diego County, California, a pond near Yuma, Arizona (United States Geological Survey 2011), and in Hawaii (Tran et al. 2008) first on Maui in 1989, followed by Lanai (Cowie 1996) and all of the main islands including Kaua'i, O'ahu, Molokai'i, Lana'i, Maui, Hawai'i (Cowie et al. 2007). In Hawaii the species has become widespread and is a major taro pest (Cowie 2005).

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Source: IUCN

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