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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 .
When the Caribbean hermit crab, Coenobita clypeatus, or "purple pincher" as it is known in the pet trade is kept as a house pet, Turbo shells are a favorite choice of shells for the crab. Turbo cornutus , common name the "horned turban", is an expensive food item in Korea, and Japan, where they are known as sazae .
Gastropods typically have a well-defined head with two or four sensory tentacles with eyes, and a ventral foot. The foremost division of the foot is called the propodium. Its function is to push away sediment as the snail crawls. The larval shell of a gastropod is called a protoconch.
Wentletrap shells have a roundish or oval aperture, but its inner lip is often reduced to strip of callus. The round and horny operculum is paucispiral and fits the aperture tightly. Most of the species in the family are small to minute, although some are larger, and overall the adult shell length in the family varies between 0.6 and 11.7 cm. [ 4 ]
The periostracum, as well as the coloration, is only rarely preserved in fossil shells. The apertural end of the gastropod shell is the anterior end, nearest to the head of the animal; the apex of the spire is often the posterior end or at least is the dorsal side. Most authors figure the shells with the apex of the spire uppermost.
The grove snail, brown-lipped snail or lemon snail (Cepaea nemoralis) is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc. [3]It is one of the most common large species of land snail in Europe, and has been introduced to North America.
Haliotis cracherodii, the black abalone, is a species of large edible sea snail, a marine gastropod mollusk in the family Haliotidae, the abalone. [3]This species is relatively small compared with most of the other abalone species from the eastern Pacific, and it has a relatively smooth dark shell.
Three species of the gastropod family Littorinidae are common on the West Africa shore. Littorina punctata has a shell height of about 8–15 mm, color brown or grey with white markings in spiral rows often giving a checked appearance. This species is usually common on all rocky West African shores, occurring from the middle to upper parts ...