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Mollusca is the second-largest phylum of invertebrate animals, after Arthropoda; members are known as molluscs or mollusks [a] ( / ˈmɒləsks / ). Around 76,000 extant species of molluscs are recognized. [3] . The number of fossil species is estimated between 60,000 and 100,000 additional species. [4] .
- Lophotrochozoa
Lophotrochozoa was defined in 1995 as the "last common...
- Helcionelloida
Yochelcionella cyrano Pelagiella atlantoides. Helcionelloida...
- Rostroconchia
Main page; Contents; Current events; Random article; About...
- Sea Silk
Knitted glove made of sea silk, from Taranto, Italy,...
- Bivalvia
Bivalvia (/ b aɪ ˈ v æ l v i ə /), in previous centuries...
- Evolution of molluscs
The evolution of the molluscs is the way in which the...
- Mollusc shell
The mollusc (or mollusk [spelling 1]) shell is typically a...
- Lophotrochozoa
- Diversity
- Main Features
- A "Generalized Mollusk"
- Taxonomy
- Uses
Many mollusks also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and in anatomical structure, but also in behaviourand in habitat. The phylum is usually divided into 9 or 10 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish and octopus, are among the most ne...
The three most universal features defining modern mollusks are: 1. a mantle with a cavity used for breathing and excretion, 2. the presence of a radula, and 3. the structure of the nervous system. Other than these things, mollusks have so much variety that many textbooks use a "hypothetical ancestral mollusk" to summarize them (see below). This has...
Because mollusks have so many different shapes, 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 common features in the phylum. The picture is rather similar to modern monoplacophorans: some think it m...
Classes of molluscs: 1. Aplacophora: molluscs: the living ones are shell-less 2. Bivalvia: Most shellfish; clams, oysters, scallops, mussels 3. Cephalopoda: Squid, Octopus 4. Gastropoda: whelks, limpets, snails, slugs, Nudibranchs 5. Helcionelloida: (see below) 6. Monoplacophora: molluscs with a cap-like shell 7. Polyplacophora: Chitons 8. †Rostroc...
Many mollusks are eaten as food: clams, oysters, scallops, mussels, squid (calamari) and land snails(escargot)Oysters sometimes make pearls, which are valuable and used to make necklaces. Other shells are collected for their beauty and sometimes used to make jewelry.- Lophotrochozoa
- Mollusca, Linnaeus, 1758
Mollusca 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.
MOLLUSCS. Mollusca is the group of animals that includes gastropods (snails, slugs, limpets etc), bivalves (clams, oysters, mussels etc), cephalopods (octopuses, nautiluses, squids etc), scaphopods (tusk shells), caudofoveates, solenogastres, monoplacophorans and polyplacophorans (chitons).
