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Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks[a] (/ ˈmɒləsks /). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. [4] The number of additional fossil species is estimated between 60,000 and 100,000, [5] and the ...
This is a partial list of edible molluscs. Molluscs are a large phylum of invertebrate animals, many of which have shells . Edible molluscs are harvested from saltwater, freshwater, and the land, and include numerous members of the classes Gastropoda (snails), Bivalvia (clams, scallops, oysters etc.), Cephalopoda (octopus and squid), and ...
Order Neomphaloida Sitnikova & Starobogatov, 1983. Superorder Vetigastropoda Salvini-Plawen, 1989 (limpets) The shell of an archaeogastropod from the Pliocene of Cyprus. A serpulid worm is attached. Superorder Neritaemorphi Koken, 1896. Order Cyrtoneritomorpha (fossil) Order Neritopsina Cox & Knight, 1960.
An octopus (pl.: octopuses or octopodes[a]) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ ɒkˈtɒpədə /, ok-TOP-ə-də[3]). The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids. Like other cephalopods, an octopus is bilaterally symmetric with two eyes and ...
Terrestrial mollusc. Land snail Helix pomatia. Land slug Bielzia coerulans. Terrestrial molluscs or land molluscs (mollusks) are an ecological group that includes all molluscs that live on land in contrast to freshwater and marine molluscs. They probably first occurred in the Carboniferous, arising from freshwater ones.
Gastropods (/ ˈɡæstrəpɒdz /), commonly known as slugs and snails, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (/ ɡæsˈtrɒpədə /). [5] This class comprises snails and slugs from saltwater, freshwater, and from the land. There are many thousands of species of sea snails and slugs, as ...
Mussel (/ ˈmʌsəl /) is the common name used for members of several families of bivalve molluscs, from saltwater and freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other edible clams, which are often more or less rounded or oval. The word "mussel" is frequently used to mean ...
Color change is widespread in ectotherms including anoles, frogs, mollusks, many fish, insects, and spiders. [45] The mechanism behind this color change can be either morphological or physiological. Morphological change is the result of a change in the density of pigment containing cells and tends to change over longer periods of time.