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mollusk
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Mollusca
The Mollusca , common name molluscs or mollusks , are a large phylum of invertebrate animals. There are around 85,000 recognized extant species of molluscs. Mollusca is the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. Molluscs are highly diverse, not only in size and in anatomical structure, but also in behaviour and in habitat. The phylum is typically divided into nine or ten taxonomic classes, of which two are entirely extinct. Cephalopod molluscs such as squid, cuttlefish and octopus are among the most neurologically advanced of all invertebrates – and either the giant squid or the colossal squid is the largest known invertebrate species. The gastropods (snails and slugs) are by far the most numerous molluscs in terms of classified species, and account for 80% of the total.
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Weichtiere
Die Weichtiere (Mollusca) oder Mollusken bilden einen arten- und formenreichen Tierstamm innerhalb der Gewebetiere (Eumetazoa) und kommen im Meer, auf dem Festland und im Süßwasser vor. Die Wissenschaft von den Weichtieren wird auch als Malakologie oder Malakozoologie bezeichnet.
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Mollusca
Les mollusques (du latin mollis, mou) sont un embranchement du règne animal. Les mollusques sont des animaux non segmentés (invertébrés), à symétrie bilatérale quelquefois altérée. Leur corps se compose généralement d'une tête, d'une masse viscérale, et d'un pied. La masse viscérale est recouverte en tout ou partie par un manteau, qui sécrète une coquille calcaire. Le système nerveux comprend un double collier périœsophagien. La cavité générale est plus ou moins réduite au péricarde et aux néphridies.
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Blötdjur
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Mieczaki
Mięczaki (Mollusca, od łac. molluscus – miękki) – typ zwierząt, najliczniejszy po stawonogach. Liczbę żyjących gatunków szacuje się na ok. 130 tysięcy. Odznaczają się olbrzymią różnorodnością morfologiczną i zróżnicowaniem rozmiarów.
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