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See all on WikipediaMollusca is the second-largest phylum of invertebrate animals, after Arthropoda; members are known as molluscs or mollusks . Around 76,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed … See more
Because of the great range of anatomical diversity among molluscs, many textbooks start the subject of molluscan anatomy by describing what is called an archi-mollusc, hypothetical generalized mollusc, or hypothetical ancestral mollusc (HAM) to illustrate the most … See more
Estimates of accepted described living species of molluscs vary from 50,000 to a maximum of 120,000 species. The total number of described species is difficult to estimate because … See more
Feeding
Most molluscs are herbivorous, grazing on algae or filter feeders. For those grazing, two feeding strategies are predominant. Some feed on … See moreFossil record
Good evidence exists for the appearance of gastropods (e.g., Aldanella), cephalopods (e.g., See moreWikipedia text under CC-BY-SA license De weekdieren of mollusken (Mollusca) vormen een stam van ongewervelde dieren met een week lichaam en in de regel een uitwendig kalkskelet (schelp). Het is na de geleedpotigen de stam met de meeste soorten, waarbij in 2019 schattingen uitgingen van ongeveer 50.000 tot 55.000 zee-, 25.000 tot 30.000 land- en 6000 tot 7000 zoetwaterweekdieren. Het aantal fossiele soorten is mi…
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WebMollusk, any soft-bodied invertebrate of the phylum Mollusca, usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body. Along with the insects and vertebrates, it is one of the …
14.4: Phylum Mollusca - Biology LibreTexts
WebPhylum Mollusca is a very diverse (85,000 species) group of mostly marine species. Mollusks have a dramatic variety of form, ranging from large predatory squids and octopus, some of which show a high degree of …
Classification and economic importance of mollusks
Webmollusk, or mollusc, Any of some 75,000 species of soft-bodied invertebrate animals (phylum Mollusca), many of which are wholly or partly enclosed in a calcium carbonate shell secreted by the mantle, a soft covering formed …
WebPhylum Mollusca is a very diverse (85,000 species) group of mostly marine species. Mollusks have a dramatic variety of form, ranging from large predatory squids and octopus, some of which show a high degree of …
5.5: Phylum Mollusca - Biology LibreTexts
WebThe phylum Mollusca is defined by several special characteristics. These defining characteristics include a mantle with a mantle cavity, a shell (except where lost), visceral mass, foot, and radula. The odontophore is in the …
Molluscs | Oxford University Museum of Natural History
WebMOLLUSCS. Mollusca is the group of animals that includes gastropods (snails, slugs, limpets etc), bivalves (clams, oysters, mussels etc), cephalopods (octopuses, nautiluses, …
WebDec 13, 2019 · Scientific Name: Mollusca (Caudofoveates, Solanogastres, Chitons, Monoplacophorans, Scaphopods, Bivalves, Gastropods, Cephalopods) Common Name: Mollusks or molluscs; Basic Animal …
WebMollusca. Linnaeus, 1758. Cypraea, the cowrie. About 80% of all known mollusc species are gastropods. Mollusks are an important phylum of invertebrate animals. Most of them are …
