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Pomacea bridgesii. (Reeve, 1856) Pomacea bridgesii, common name the spike-topped apple snail or mystery snail, is a South American species of freshwater snail with gills and an operculum, an aquatic gastropod mollusk in the family Ampullariidae. These snails were most likely introduced to the United States through the aquarium trade.
105–170 freshwater species; 9 genera; more than 150 nominal species. Synonyms. Pilidae. 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.
The Chinese mystery snail, black snail, or trapdoor snail (Cipangopaludina chinensis), is a large freshwater snail with gills and an operculum, an aquatic gastropod mollusk in the family Viviparidae. [3][4] The Japanese variety of this species is black and usually a dark green, moss-like alga covers the shell. [citation needed] The name ...
Viviparidae. Viviparidae, sometimes known as the river snails or mystery snails, are a family of large aquatic gastropod mollusks, being some of the most widely distributed operculate freshwater snails. This family is classified in the informal group Architaenioglossa according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005.
Viviparus georgianus, common name the banded mystery snail, is a species of large freshwater snail with gills and an operculum, an aquatic gastropod mollusk in the family Viviparidae, the river snails. This snail is native to the southeastern United States. The specific epithet georgianus is a reference to the southern State of Georgia, where ...
The term ramshorn snail or ram's horn snail is used in two different ways. In the aquarium trade it is used to describe various kinds of freshwater snails whose shells are planispiral, meaning that the shell is a flat coil. Such shells resemble a coil of rope, or (as the name suggests) a ram 's horn. In a more general natural history context ...
Reproductive system of gastropods. Entwined everted penises of a pair of mating hermaphrodite slugs in the species Limax maximus. The reproductive system of gastropods (slugs and snails) varies greatly from one group to another within this very large and diverse taxonomic class of animals. Their reproductive strategies also vary greatly.
Reproduction and development. Calliostoma ligatum is a broadcast spawner. Snails spawned in the laboratory in the San Juan Islands, WA, USA, during the months of February, March, and April, but only in water that was at least 10 °C. Females release eggs in delicate strands of mucus that break down soon after release.