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Chitons have a shell composed of eight separate shell plates or valves. These plates overlap slightly at the front and back edges, and yet articulate well with one another.
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Chiton.
| Chiton Temporal range: | |
|---|---|
| Phylum: | Mollusca |
| Class: | Polyplacophora Blainville, 1816 |
| Subgroups | |
| See text. | |
- Is chiton an invertebrate?
- What type of skeleton does a chiton have?
- Do chitons have limbs?
- Does chiton have head?
- How do you identify a chiton from its external appearance?
- Do all members of the class Gastropoda have a shell?
- How many eyes does a chiton have?
- What is a chiton shell made of?
- Are molluscs Cephalized?
- Are chitons segmented?
- Which Mollusca is called tusk shell?
- How does chiton move?
- How do you use a chiton?
Is chiton an invertebrate?
chiton, any of numerous flattened, bilaterally symmetrical marine mollusks, worldwide in distribution but most abundant in warm regions. The approximately 600 species are usually placed in the class Placophora, Polyplacophora, or Loricata (phylum Mollusca).
What type of skeleton does a chiton have?
Modern chitons (Mollusca: Polyplacophora) possess a highly conserved skeleton of eight shell plates (valves) surrounded by spicules or scales, and fossil evidence suggests that the chiton skeleton has changed little since the first appearance of the class in the Late Cambrian period (about 500 million years before ...
Do chitons have limbs?
Not that they have a limb. Chitons are almost 1,000 species of decidedly retro mollusc who reach anywhere between less than 1 cm (0.4 in) and over 30 cm (1 foot) long. They belong to a class called Polyplacophora, which means "bearer of many plates", or "look! ... Chitons can stay completely covered at all times.
Does chiton have head?
Chitons are untorted, bilaterally symmetrical molluscs with a distinct head and a shell composed of a longitudinal series of eight shingle-like, overlapping plates. The species range from 3 to 430 mm in body length (Salvini-Plawen 1985).
How do you identify a chiton from its external appearance?
A musculature mantle that extends beyond the margins of the shell and foot covers the broad foot. A linear series of gills is in the mantle cavity on each side of the foot through which oxygen can absorb. this is what the chiton external appearance is.
Do all members of the class Gastropoda have a shell?
Class Bivalvia consists of mollusks with two shells held together by a muscle; these include oysters, clams, and mussels. Members of class Gastropoda have an asymmetrical body plan and usually have a shell, which can be planospiral or conispiral.
How many eyes does a chiton have?
And chitons have up to 1,000 eyes and can grow more throughout their lifetimes, replacing any that are damaged.
What is a chiton shell made of?
The plates refer to the shell, which is made of aragonite, a calcium carbonate mineral. The shell is quite flexible, and the chiton can even roll into a ball.
Are molluscs Cephalized?
Both flatworms and molluscs are triploblastic, bilaterally symmetric, and cephalized. But molluscs have developed a true coelom, an internal body cavity enclosed by mesodermal membranes. ... Molluscs are mostly aquatic, and are named from the Latin molluscus, meaning "soft".
Are chitons segmented?
Chitons are small mollusks, oval in outline, with a broad foot, and a mantle that secretes, and sometimes extends over, the shell. ... Internally, there is no evidence of segmentation, and the eight valves are actually derived from a single embryonic shell.
Which Mollusca is called tusk shell?
tusk shell, also called elephant's tusk, elephant's tooth, or tooth shell, any of several marine mollusks of the class Scaphopoda. There are four genera of tusk shells (Dentalium is typical and most common) and more than 350 species.
How does chiton move?
Chitons move by creeping slowly using the muscular foot for locomotion and adhesion, and their separate, articulating valves allow them to move over and cling tightly to sharply curved or irregular surfaces.
How do you use a chiton?
Blouse the hem of the chiton until it comes just above the person's knees. Wrap the cloth around the person's body, like with a chiton, but only pin the cloth over his right shoulder. That's it. This piece of clothing is a simple cloak.
