Spike-topped applesnail

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Pomacea diffusa, common name the spike-topped apple snail or Mystery Snail, is a species of freshwater snail, an aquatic gastropod mollusk in the family Ampullariidae, the apple snails. Taxonomy Pomacea diffusa was originally described as a subspecies of Pomacea bridgesii. Pain (1960) argued that Pomacea bridgesii bridgesii was a larger form with a restricted range, with the smaller Pomacea bridgesii diffusa being the common form throughout the Amazon Basin (Brazil, Peru, Bolivia).

Pomacea diffusa es una especie de molusco gasterópodo dulceacuícola que integra el género Pomacea de la familia Ampullariidae. Es denominado comúnmente caracol manzana o ampularia. Habita en ambientes acuáticos en regiones cálidas del centro-norte de América del Sur.