Pomacea scalaris

Pomacea scalaris is a species of freshwater snail of the Ampullariidae ("apple snails") family. It was described by Alcide d'Orbigny in 1835.^[1][2] It is found in Bolivia, Paraguay, Argentina, Brasil, and Uruguay.^[3] It is invasive in Taiwan. First documented in 1989, it was possibly introduced alongside Pomacea canaliculata illegally brought to the country for aquaculture.^[4]

Pomacea scalaris
Five views of a shell of P. scalaris form Argentina
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Architaenioglossa
Family:	Ampullariidae
Subfamily:	Pomaceinae
Genus:	Pomacea
Species:	P. scalaris
Binomial name
Pomacea scalaris (d'Orbigny, 1835)[1][2]
Synonyms
Ampullaria scalaris d'Orbigny, 1835 (original combination) Ampullaria angulata Jay, 1836 Ampullaria angulata Deshayes, 1850 (invalid: junior homonym of Ampullaria angulata Jay, 1836) Pomacea (Pomacea) scalaris (d'Orbigny, 1835)· accepted, alternate representation

Pomacea scalaris can grow to a shell length of at least 31 mm (1.2 in).^[4]