What are the characteristics of class polychaeta?

Class Polychaeta

• Metamerically segmented.
• Bilateral symmetry.
• Chitinous setae called parapodia.
• Schizocoelic.
• Closed circulatory system.
• Complete digestive system.
• Respiration through skin, gills or parapodia.
• Nephridia for excretion.

What class is polychaeta?

Annelida
polychaete, any worm of the class Polychaeta (phylum Annelida).

What is the common name for polychaeta?

Integrated Taxonomic Information System – Report

What animals are in the class oligochaeta?

Specifically, oligochaetes comprise the terrestrial megadrile earthworms (some of which are semiaquatic or fully aquatic), and freshwater or semiterrestrial microdrile forms, including the tubificids, pot worms and ice worms (Enchytraeidae), blackworms (Lumbriculidae) and several interstitial marine worms.

What are some examples of oligochaeta?

Earthworm
NaididaeEnchytraeidaeHaplotaxidsLumbriculidae
Earthworms/Lower classifications

What do scale worms eat?

Scale worms are carnivorous, feeding on other small invertebrates like crabs, sea stars, snails and even other polychaetes.

What class are bristle worms in?

Polychaetes
Polychaetes belong the phylum Annelida, the segmented worms. The phylum also includes the classes Hirudinea, which contain the leeches, and the Oligochaeta, the earthworms. The class Polychaeta are the marine worms, such as the nereids (sandworms) and glycerids (bloodworms).

Which is example of Oligochaeta?

Earthworms/Lower classifications
Oligochaete, any worm of the subclass Oligochaeta (class Clitellata, phylum Annelida). About 3,500 living species are known, the most familiar of which is the earthworm (q.v.), Lumbricus terrestris. Oligochaetes are common all over the world. They live in the sea, in fresh water, and in moist soil.

How do you identify an Oligochaeta?

Oligochaete worms have long, segmented, tubular bodies, giving them the appearance of a piece of thick spaghetti. They can range in length from just a few millimeters to over 10 feet! You won’t find a head or any limbs on these guys either, but they can still get around pretty well by peristalsis.

What are the body segments of a polychaete made of?

Polychaete. The Polychaeta /ˌpɒlɪˈkiːtə/, also known as the bristle worms or polychaetes, are a paraphyletic class of annelid worms, generally marine. Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin.

Which is the most common polychaete in the world?

Common representatives include the lugworm (Arenicola marina) and the sandworm or clam worm Alitta. Polychaetes as a class are robust and widespread, with species that live in the coldest ocean temperatures of the abyssal plain, to forms which tolerate the extremely high temperatures near hydrothermal vents.

How does a polychaete differ from a clitellate?

In contrast to clitellates, polychaetes have no permanent sex organs, possess no permanent ducts for their sex cells and usually have separate sexes. Some polychaetes are free moving pelagic forms, some are active burrowers and crawlers, and some are sedentary, living in tubes or burrows.

What kind of habitat does a Polychaeta live in?

Class Polychaeta. Some polychaetes are free moving pelagic forms, some are active burrowers and crawlers, and some are sedentary, living in tubes or burrows. Most sedentary dwellers are particle feeders, using ciliary or mucoid methods of obtaining food. Their principal food source is plankton and detritus.