Table of Contents
What are mollusks with a shell called?
Certain groups of mollusks have a hardened shell surrounding their tissues. Clams, mussels, scallops, and oysters collectively make up the bivalves, a subcategorization of mollusks.
Which mollusc has internal shell?
The gastropods are the most numerous molluscs and account for approx. 80 \% of the total. The shell is mostly large enough to cover and protect all the soft parts from predation and dessication. The slugs have an internal shell, internal chalk granules or no shell at all.
What are the different types of cuttlefish?
Sepiidae
Sepiadariidae
Cuttlefishes/Lower classifications
Do all molluscs have shells?
Not all shelled molluscs live in the sea; many live on the land and in freshwater. The ancestral mollusc is thought to have had a shell, but this has subsequently been lost or reduced on some families, such as the squid, octopus, and some smaller groups such as the caudofoveata and solenogastres.
Do all molluscs have a shell?
Mollusks usually have a shell (although some do not). Mollusks also have an extension of the body wall called the mantle. This portion of the animal’s anatomy is responsible for secreting the shell. The mantle encloses the mantle cavity which contains the Ctenidia (gills), anus and excretory pores.
What are the shells of mollusks made of?
calcium carbonate
The mineral part of the molluscan shell is typically made entirely of calcium carbonate, in particular, calcite and/or aragonite.
Do mollusks shell?
Their shells are made of calcium carbonate. The shells are very decorative on the inside for many marine species, and the outside for many snails. Most mollusks have at least two stages of life and their second stage (or adult phase) is often marked by bearing a shell.
What is the cuttlefish scientific name?
Sepiida
Cuttlefishes/Scientific names
Which phylum does cuttlefish belong?
Mollusca
Common cuttlefish | |
---|---|
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Cephalopoda |
Order: | Sepiida |
What mollusk has no shell?
Mollusks without shells include squid, banana slugs, and octopi. Some mollusks are terrestrial, occurring in most environments on earth, while others live in the water for some or all of their life. Many of the most popular mollusks are marine species because they are pretty and some are caught for food or jewelry.
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