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Helicidae is a large, diverse family of western Palaearctic, medium to large-sized, air-breathing land snails, sometimes called the "typical snails."It includes some of the largest European land snails, several species are common in anthropogenic habitats, and some became invasive on other continents.
The young snails are kept in the nursery for about 6 weeks, and then moved to a separate pen, as young snails do best if kept with other snails of similar size. Eight hours of daylight is optimal for young snails. Baby snails are fed on tender lettuce leaves (Boston type, but head type is probably also good). Cannibalism by hatchlings
Turritellidae, with the common name "tower shells" or "tower snails", is a taxonomic family of small- to medium-sized sea snails, marine gastropod molluscs in the Sorbeoconcha clade. They are filter feeders ; this method of feeding is somewhat unusual among gastropod mollusks, but is very common in bivalves .
Live snails for sale in a market in France. There is a tradition of consuming snails in Andorra, Spain, France, Italy, and Portugal on the European side and Algeria, Morocco, and Tunisia on the African side. Cornu aspersum is the most widespread species in the Mediterranean basin, the Iberian Peninsula, and the French Atlantic coast.
The new species belong to the same family of marine snails as the invasive “Spider-Man” snail that the same team found off the Florida Keys in 2017, the Field Museum said.
Gastropods are morphologically highly variable and have diverse feeding strategies. Snails can be herbivores, detritivores, scavengers, parasites, ciliary feeders, or have highly specialized predation. [12] Nearly all snails utilize a feeding apparatus including the oral structures of one or more jaws and the radula.
The two major classes of molluscs have representatives in freshwater: the gastropods (snails) and the bivalves (freshwater mussels and clams.) It appears that the other classes within the Phylum Mollusca -the cephalopods, scaphopods, polyplacophorans, etc. - never made the transition from a fully marine environment to a freshwater environment.
The reason why this happens only to mature snails is not yet known, but one hypothesis is that a mature snail will excrete a signal substance which attracts the P. ciliata larvae. Another hypothesis is that a mature snail has a change in the shell surface that makes it suitable for P. ciliata larvae to settle. The infection by this parasite ...
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