Table of Contents
Which mollusk group is the largest?
gastropods
The three major groups of mollusks are gastropods, bivalves, and cephalopods (SEF ul o pods). The largest group is the gastropods. These are mollusks like snails and slugs that have just one shell or no shell at all.
What phylum do mollusks belong to?
MOLLUSCA – THE MOLLUSKS (CLAMS, SNAILS, CEPHALOPODS ET AL.) The phylum Mollusca is the second most diverse phylum after Arthropoda with over 110,000 described species.
Why Mollusca is the second largest phylum?
Mollusca is the second largest Phylum in the Animal Kingdom. They are bilaterally symmetrical, triploblastic and coelomate animals. Their body is covered by a shell.
What type of animal is a mollusk?
Mollusks. The mollusk group spans over 50,000 known species. They include snails, clams, oysters, mussels, squid and octopods. In general, their bodies include three parts: the head, internal organs and a “foot.”.
Which of these animals is in the phylum Mollusca?
The phylum Mollusca is the second-largest animal phylum, with over 100,000 species. The molluscs include many familiar animals, including clams, snails, slugs, and squid, as well as some less familiar animals, like tusk shells and chitons (Fig.
Which is the largest phylum of animals?
phylum Arthropoda
arthropod, (phylum Arthropoda), any member of the phylum Arthropoda, the largest phylum in the animal kingdom, which includes such familiar forms as lobsters, crabs, spiders, mites, insects, centipedes, and millipedes. About 84 percent of all known species of animals are members of this phylum.
Which example belongs to the phylum Mollusca in the Animalia kingdom?
Molluscans are very diverse animals and form an important part of the ecosystem in the world. Some animals that you are familiar with like snails, octopuses, squids, oysters, clams etc. all belong to Phylum Mollusca.
Which is the 3rd largest phylum of animal kingdom?
Chordata
-Mollusca is the second largest Phylum while Chordata is the third-largest Phylum.
Which is an example of a phylum Mollusca?
The shell is either external, internal, or not present at all. They have separate sexes. The development is direct. Following are a few examples of the animals belonging to phylum Mollusca: Phylum Mollusca is the second largest phylum. A few molluscs such as Unio possess green glands which mimic the liver in vertebrates.
Which is the largest phylum of marine organisms?
Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and in anatomical structure, but also in behaviour and in habitat.
Which is the second largest phylum in the world?
The phylum Mollusca is the second-largest animal phylum, with over 100,000 species. The molluscs include many familiar animals, including clams, snails, slugs, and squid, as well as some less familiar animals, like tusk shells and chitons (Fig. 3.51 A).
How many species of molluscs are there in the world?
About 80% of all known mollusc species are gastropods ( snails and slugs ), including this cowry (a sea snail). 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 of unresolved synonymy.