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The mantle cavity is a central feature of molluscan biology. This cavity is formed by the mantle skirt, a double fold of mantle which encloses a water space. This space contains the mollusk's gills, anus, osphradium, nephridiopores, and gonopores. The mantle cavity functions as a respiratory chamber in most mollusks. In bivalves it is usually ...
The mantle can also withdraw into the shell opening when threatened. In this species, the exterior surface of the mantle has numerous pin-like projections that are white-tipped. Distribution and habitat
Portal:Gastropods/Selected picture/1 . The sculpture of this shell of Epitonium scalare is raised vertical ribs which are known as costae.Costae are a common feature in the shells of many species within the genus Epitonium, generally known as wentletraps (a word derived from the Dutch word for spiral staircase).
Mantle of giant clam with light-sensitive spots, which detect danger and cause the clam to close. Tridacna gigas, the giant clam, is the best-known species of the giant clam genus Tridacna. Giant clams are the largest living bivalve mollusks. Several other species of "giant clam" in the genus Tridacna are often misidentified as Tridacna gigas.
In 2003, a complete specimen of a subadult female was found near the surface with a total length of 6 m (20 ft) and a mantle length of 2.5 m (8 feet 3 inches). [16] In 2005, the first full living specimen was captured at a depth of 1,625 m (5,331 ft) while taking a toothfish from a longline off South Georgia Island . [ 50 ]
During a growth spurt, the rear of the mantle secretes a new septum, adding another chamber to the series of shell chambers. At the same time, shell material is added around the shell opening ( aperture ), enlarging the body chamber and providing more room for the growing animal.
The day that you get photos back. One woman could not stop laughing when she saw the pictures her dog's day care took of him. They were hilarious! These are definitely going on the mantel for sure.
Cowrie (Cypraea chinensis) with fully extended mantle Shells of various species of cowrie; all but one have their anterior ends pointing towards the top of this image. Cowrie or cowry (pl. cowries) is the common name for a group of small to large sea snails in the family Cypraeidae.