Polychaete

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Polychaete

Polychaete (pronounced: /ˈpɒlɪkiːt/), from the Greek words poly meaning "many" and chaite meaning "hair", is a class of annelid worms, generally marine.

Etymology

The term "Polychaete" is derived from the Greek words poly (πολύς) meaning "many" and chaite (χαίτη) meaning "long hair". This refers to the numerous bristle-like structures, called chaetae, found along the body of these worms.

Description

Polychaetes are characterized by well-developed head structures and a body divided into many segments, each bearing a pair of paddle-like and highly vascularized parapodia for locomotion and respiration. The body also has numerous chaetae, which are chitinous, bristle-like structures.

Classification

Polychaetes belong to the phylum Annelida, which also includes earthworms and leeches. They are further divided into many families, including the Nereididae, Serpulidae, and Sabellidae, among others.

Habitat and Distribution

Polychaetes are predominantly marine animals and can be found in a variety of habitats, from tidal zones to deep-sea regions. Some species are known to inhabit freshwater and terrestrial environments.

Related Terms

External links

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