Pomacea scalaris is a species of freshwater snail of the Ampullariidae ("apple snails") family. It was described by Alcide d'Orbigny in 1835. It is found in Bolivia, Paraguay, Argentina, Brasil, and Uruguay. It is invasive in Taiwan. First documented in 1989, it was possibly introduced alongside Pomacea canaliculata illegally brought to the country for aquaculture.

Pomacea scalaris can grow to a shell length of at least 31 mm (1.2 in).

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