What is phylum Mollusca characteristics?

What is phylum Mollusca characteristics?

Molluscs (also know as mollusks) are soft-bodied, bilaterally symmetrical, segmented, coelomate animals; usually shelled having a mantle, ventral foot, anterior head, and a dorsal visceral mass.

Why is Mollusca called Mollusca?

The term Mollusca was derived from the term given by Aristotle to cuttlefish. Mollusc means soft. These organisms are found in the terrestrial as well as in deep seas. Their size ranges from microscopic organisms to organisms 20 metres long.

What makes phylum Mollusca unique?

A feature unique to molluscs is a file-like rasping tool called a radula. This structure allows them to scrape algae and other food off rocks and even to drill through the shell of prey or catch fish.

What are the 4 major classes of phylum Mollusca?

The Phylum Mollusca consist of 8 classes: 1) the Monoplacophora discovered in 1977; 2) the worm-like Aplacophora or solenogasters of the deep sea; 3) the also worm-like Caudofoveata; 4) the Polyplacophora, or chitons; 5) the Pelecypoda or bivalves; 6) the Gastropoda or snails; 7) the Scaphopoda, or tusk shells; and 8) …

What does Mollusca mean in Latin?

thin-shelled
Etymology. From French mollusque, from New Latin Mollusca (phylum name), from Latin molluscus (“thin-shelled”), from mollis (“soft”); see Proto-Indo-European *mel-.

What are 3 characteristics all animals in phylum Mollusca have?

The three most universal features defining modern molluscs are a mantle with a significant cavity used for breathing and excretion, the presence of a radula (except for bivalves), and the structure of the nervous system.

What features do molluscs have in common?

WHAT FEATURES DO MOLLUSKS HAVE IN COMMON? As well as a shell, most mollusks have a muscular foot for creeping or burrowing. Some also have a head with sense organs. The soft body includes lungs or gills for breathing, and digestive and reproductive parts, all enclosed by a skinlike organ called the mantle.

What organisms make up phylum Mollusca?

What organisms make up phylum Mollusca? Squid and octopuses to snails, sea slugs, oysters, clams, and conches.

What do phylum Mollusca have in common?

Molluscs are a clade of organisms that all have soft bodies which typically have a “head” and a “foot” region. Often their bodies are covered by a hard exoskeleton, as in the shells of snails and clams or the plates of chitons.

Where are phylum Mollusca found?

marine environments
Molluscs are found in nearly all freshwater and marine environments, and some are found also on land. The marine molluscs are probably the best-known and easily recognized members of the phylum. Many of their shells are highly valued by collectors.

What is the Latin meaning of the phylum and class?

phylum (n.) “a primary division of the plant or animal kingdom, a genetically related tribe or race of organisms,” 1868, Modern Latin, coined by French naturalist Georges Léopole Chrétien Frédéric Dagobert, Baron Cuvier (1769-1832) from Greek phylon “race, stock,” related to phylē “tribe, clan” (see phylo-).

What does the name mollusk mean?

Definition of mollusk : any of a large phylum (Mollusca) of invertebrate animals (such as snails, clams, or squids) with a soft unsegmented body usually enclosed in a calcareous shell broadly : shellfish. Other Words from mollusk Example Sentences Learn More About mollusk.

What are the 3 major classes of phylum Mollusca?

– Gastropods. Gastropods include snails and slugs. They use their foot to crawl. – Bivalves. Bivalves include clams, scallops, oysters, and mussels. – Cephalopods. Cephalopods include the octopus and squid.

What does phylum do mollusk belong to?

GASTROPODA (single shelled cowries,cones etc)

  • BIVALVIA ( two shelled like clams,mussels etc)
  • APLACOPHORA (solenogasters)
  • MONOPLACOPHORA (segmented limpets)
  • POLYPLACOPHORA ( or Amphineura as it was earlier called- Chitons)
  • SCAPHOPODA (tusk shells)
  • What is phylum molluscs all about?

    Phylum Mollusca, known as mollusks, are a group of invertebrate animals that include slugs, snails, mussels, octopus, bivalves, gastropods, etc.This phylum is attributed to 85,000 species with tens of thousands of extinct Mollusca species.. Mollusks is one of the most fascinating and diverse animal groups on our planet.. Although most people would recognize mollusks, it is also true that they

    What are the characteristics of phylum?

    i) They are unicellular, diploid, colonial or free living. One group of them (Pennales) live in fresh water and other group (Centrales) live in saline water of sea ii) They are non-flagellated. but the gametes are motile iv) Cell wall is enriched with silica and is well tined with salve (theca).

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