Ampullariidae, whose members are commonly known as apple snails, is a family of large freshwater snails that includes the mystery snail species. They are aquatic gastropod mollusks with a gill and an operculum. These snails simultaneously have a gill and a lung as functional respiratory structures, which are separated by a division of the mantle cavity. This adaptation allows these animals to be amphibious. Species in this family are considered gonochoristic, meaning that each individual organism is either male or female.
Pila is a genus of large freshwater snails with an operculum, African and Asian apple snails, aquatic gastropod mollusks in the family Ampullariidae, the apple snails.
Pomacea is a genus of freshwater snails with gills and an operculum, aquatic gastropod mollusks in the family Ampullariidae, the apple snails. The genus is native to the Americas; most species in this genus are restricted to South America.
Pomacea canaliculata, commonly known as the golden apple snail or the channeled apple snail, is a species of large freshwater snail with gills and an operculum, an aquatic gastropod mollusc in the family Ampullariidae, the apple snails. South American in origin, this species is considered to be in the top 100 of the "World's Worst Invasive Alien Species". It is also ranked as the 40th worst alien species in Europe and the worst alien species of gastropod in Europe.
Pomacea haustrum, common name the titan applesnail, is a species of large freshwater snail with an operculum, an aquatic gastropod mollusk in the family Ampullariidae, the applesnails.
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.
Pomacea maculata is a species of large freshwater snail with an operculum, an aquatic gastropod mollusk in the family Ampullariidae, the apple snails.
Pomacea baeri is a South American species of freshwater snail in the family Ampullariidae, the apple snails. Its possible synonymy with Pomacea glauca is unresolved.
The perivitellinefluid is an extracellular fluid found in the eggs of most gastropods and constitutes the main source of nutrition and defense for their embryos. It replaces the egg yolk of other animals, which in snail eggs is reduced to non-nutritive proteinaceous granules with putative enzymatic function.
Perivitellins are egg proteins found in the perivitelline fluid of many gastropods. They are multifunctional complexes providing the developing embryo with nutrition, protection from the environment, and defense against predators.
Pomacea columellaris is a South American species of freshwater snail in the apple snail family, Ampullariidae.
Pomacea decussata is a species of freshwater snail in the family Ampullariidae.
Pomacea comissionis is a species of freshwater snail in the family Ampullariidae. It was first described by Hermann von Ihering in 1898 as a variety of Ampullaria decussata. It is known from Iguape, Brazil.
Pomacea occulta is a species of freshwater snail in the family Ampullariidae. Previously misidentified as the cryptically similar Pomacea maculata, P. occulta was differentiated by Yang and Yu in 2019 using DNA barcoding and molecular systematics.
Pomacea fasciata is a freshwater snail in the Ampullariidae family. It is known from Jamaica, Guadeloupe, and Hispaniola. It lays white eggs.
Pomacea prunella is a species of freshwater snail in the family Ampullariidae. It is known from Brazil and French Guiana. Unlike other New World Ampullariids, P. prunella has a calcified, rather than corneous, operculum.
