What are characteristics of chitons?
Chitons are flattened, elongately-oval, with eight overlapping dorsal shell plates or valves, bordered by a thick girdle formed from the mantle that may be covered with spines, scales, or hairs.
How many chitons are there?
Chitons (/ˈkaɪtənz/) are marine molluscs of varying size in the class Polyplacophora (/ˌpɒlipləˈkɒfərə/), formerly known as Amphineura. About 940 extant and 430 fossil species are recognized….Chiton.
|Chiton Temporal range:|
|Class:||Polyplacophora Blainville, 1816|
What class do chitons belong to?
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). Chitons are usually oval in shape.
Are chitons Cephalized?
The ancestral mollusc probably resembled a chiton, a flattened worm like animal protected by a dorsal shell. Both molluscs and annelids probably evolved from free-living flatworms. Both flatworms and molluscs are triploblastic, bilaterally symmetric, and cephalized.
What are chitons?
Definition of chiton 1 : any of a class (Polyplacophora) of elongated bilaterally symmetrical marine mollusks with a dorsal shell of calcareous plates. 2 [Greek chitōn] : the basic garment of ancient Greece worn usually knee-length by men and full-length by women.
How do chitons adapt to their environment?
Chitons are adapted to living on hard rock surfaces. They have a very muscular foot, and when disturbed, can clamp down so that they cannot be dislodged unless their shell is smashed. Chitons can live for one to twenty years, or more.
How common are chitons?
It is the most common chiton species in New Zealand. Chiton glaucus is part of a very primitive group of mollusc with evidence of being present in up to 80 million years of the fossil record….
Are chitons endangered?
Not extinctChitons / Extinction status
What are siphons and what is their purpose?
Siphons in molluscs are tube-like structures in which water (or, more rarely, air) flows. The water flow is used for one or more purposes such as locomotion, feeding, respiration, and reproduction. The siphon is part of the mantle of the mollusc, and the water flow is directed to (or from) the mantle cavity.
What are chitons used for?
A chiton (Greek: χιτών, khitōn) is a form of tunic that fastens at the shoulder, worn by men and women of ancient Greece and Rome.
What are chitons made of?
Chiton is a type of sewn clothing worn by ancient Greeks from 750-30 BC. It was generally made from single rectangle of woolen or linen fabric. At the waist chiton was kept in place by a belt. There were two styles of chiton throughout the history, Doric or Dorian and Ionic.
How do chitons protect themselves?
The distinctive feature of all chitons is their eight overlapping plates, which protect them from predators and strong crashing waves. When disturbed they use their muscular, mucus-secreting foot to clamp down hard on rocks, making them difficult to dislodge.
What are the habits of a chiton?
Life habits. A chiton creeps along slowly on a muscular foot, and can cling to rocks very powerfully, like a limpet. Chitons eat algae, bryozoans, diatoms and sometimes bacteria by scraping the rocky substrate with their well-developed radula.
How does a chiton protect its body?
This well-armored creature’s body is covered by an overlapping eight-part shell (called shell valves), which protects its soft molluscan body. Chitons do move and use their radulas, (a structure of tiny teeth), to graze in the intertidal on encrusting animals and algae. At low tide, or when disturbed, a chiton will clamp down tightly to a rock.
What is the most recent classification of chitons?
The most recent classification, by Sirenko (2006), is based not only on shell morphology, as usual, but also other important features, including aesthetes, girdle, radula, gills, glands, egg hull projections, and spermatozoids. It includes all the living and extinct genera of chitons.
Do chitons return to the same place every day?
Some chitons exhibit homing behavior, returning to the same spot for the daylight hours and roaming around at night to feed. The largest chiton (up to 33 cm in length) is the brick-red gumboot chiton of the P acific Northwest, in which the valves are completely internal.