Are phylum Mollusca vertebrates?
Mollusks are a phylum of invertebrate animals defined by their distinct body structure — a head, a visceral mass, a mantle and some kind of foot. The mantle protects the mollusk’s body in place of a skeletal structure, and the “foot” has taken on many adaptions across the mollusca species.
Is a mussel an invertebrate?
Although the term is primarily applied to marine species, edible freshwater invertebrates such as crayfish and river mussels are also sometimes grouped under the umbrella term “shellfish”. Although their shells may differ, all shellfish are invertebrates.
Does Mollusca have backbone?
All mollusks are invertebrates. This means that they have no backbone, or spine. All mollusks also have soft bodies. In many cases, they grow shells to help protect their soft body parts.
Which of these class is phylum Mollusca?
Phylum Mollusca is a very diverse (85,000 species ) group of mostly marine species, with a dramatic variety of form. This phylum can be segregated into seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia, Gastropoda, Cephalopoda, and Scaphopoda.
What are the 5 main classes of 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 are the 4 classes of Mollusca?
The four major groups of mollusks (phyla Mollusca) are: 1) chitons; 2) gastropods, including snails, slugs (mostly marine, but some freshwater), and nudibranches.
What is the largest group of mollusks?
gastropods
What are 4 examples of bivalves?
They include the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater.
What is the largest mollusk in the world?
Reaching lengths of up to 4 feet and weighing more than 500 lbs., the largest living mollusk, and bivalve for that matter, is the giant clam (Tridacna gigas).
What animals dont have eyes?
10 Incredible Animals Without Eyes
- Freshwater hydra (Hydra magnipapillata)
- Widemouth blindcat (Satan eurystomus)
- Texas blind salamander (Eurycea rathbuni)
- Blind legless lizard (Dibamus dalaiensis)
- Mexican tetra (Astyanax mexicanus)
- Southern cave crayfish (Orconectes australis)
- Kauai cave wolf spider (Adelocosa anops)