Chaetacanthus (polychaete)
''Chaetacanthus'' is a genus of polychaetes belonging to the family Polynoidae Polynoidae is a family of marine Polychaete worms known as "scale worms" due to the scale-like elytra on the dorsal surface. Almost 900 species are currently recognised belonging to 9 subfamilies and 167 genera. They are active hunters, but gene .... The species of this genus are found in America. Species: *'' Chaetacanthus barbatus'' *'' Chaetacanthus brasiliensis'' *'' Chaetacanthus harrisae'' *'' Chaetacanthus magnificus'' *'' Chaetacanthus ornatus'' *'' Chaetacanthus pilosus'' *'' Chaetacanthus pomareae'' References {{Taxonbar, from=Q3916931 Phyllodocida Annelid genera ...
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Polychaete
Polychaeta () is a paraphyletic class (biology), class of generally marine invertebrate, marine annelid worms, common name, commonly called bristle worms or polychaetes (). Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. More than 10,000 species are described in this class. Common representatives include the lugworm (''Arenicola marina'') and the Alitta virens, sandworm or Alitta succinea, 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. Polychaetes occur throughout the Earth's oceans at all depths, from forms that live as plankton near the surface, to a 2- to 3-cm specimen (still unclassified) observed by the robot ocean probe Nereus (underwater vehicle), ''Nereus'' at the bottom of the Challenger Deep, the deepes ...
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Polynoidae
Polynoidae is a family of marine Polychaete worms known as "scale worms" due to the scale-like elytra on the dorsal surface. Almost 900 species are currently recognised belonging to 9 subfamilies and 167 genera. They are active hunters, but generally dwell in protected environments such as under stones. The group is widely distributed from shallow intertidal waters to hadal trenches. They are the most diverse group of polychaetes in terms of genus number and second most diverse in terms of species number which is almost 8% of all segmented worm species. Description Most Polynoidae species are short and flattened, but can reach as much as 20 cm in length and 10 cm width in ''Eulagisca gigantea'' and ''Eulagisca uschakovi''. Individuals are usually covered almost entirely by elytra, which can be shed and regenerated in many species. The elytra of some species are faintly bioluminescent, and leave glowing traces around the mouthparts of their predators, making those preda ...
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Chaetacanthus Barbatus
Chaetacanthus may refer to: * ''Chaetacanthus'' (polychaete), a genus of polychaetes in the family Polynoidae * ''Chaetacanthus'', a genus of plants in the family Acanthaceae, synonym of ''Dyschoriste ''Dyschoriste'' is a genus of flowering plants in the family Acanthaceae. Members of the genus are commonly known as snakeherb. Etymology The name comes from the Greek '' δυσ'', ''poorly'', and '' χωριστός'', ''to split'', in referenc ...

Chaetacanthus Brasiliensis
Chaetacanthus may refer to: * ''Chaetacanthus'' (polychaete), a genus of polychaetes in the family Polynoidae * ''Chaetacanthus'', a genus of plants in the family Acanthaceae, synonym of ''Dyschoriste ''Dyschoriste'' is a genus of flowering plants in the family Acanthaceae. Members of the genus are commonly known as snakeherb. Etymology The name comes from the Greek '' δυσ'', ''poorly'', and '' χωριστός'', ''to split'', in referenc ...

Chaetacanthus Harrisae
Chaetacanthus may refer to: * ''Chaetacanthus'' (polychaete), a genus of polychaetes in the family Polynoidae * ''Chaetacanthus'', a genus of plants in the family Acanthaceae, synonym of ''Dyschoriste ''Dyschoriste'' is a genus of flowering plants in the family Acanthaceae. Members of the genus are commonly known as snakeherb. Etymology The name comes from the Greek '' δυσ'', ''poorly'', and '' χωριστός'', ''to split'', in referenc ...

Chaetacanthus Magnificus
Chaetacanthus may refer to: * ''Chaetacanthus'' (polychaete), a genus of polychaetes in the family Polynoidae * ''Chaetacanthus'', a genus of plants in the family Acanthaceae, synonym of ''Dyschoriste ''Dyschoriste'' is a genus of flowering plants in the family Acanthaceae. Members of the genus are commonly known as snakeherb. Etymology The name comes from the Greek '' δυσ'', ''poorly'', and '' χωριστός'', ''to split'', in referenc ...

Chaetacanthus Ornatus
Chaetacanthus may refer to: * ''Chaetacanthus'' (polychaete), a genus of polychaetes in the family Polynoidae * ''Chaetacanthus'', a genus of plants in the family Acanthaceae, synonym of ''Dyschoriste ''Dyschoriste'' is a genus of flowering plants in the family Acanthaceae. Members of the genus are commonly known as snakeherb. Etymology The name comes from the Greek '' δυσ'', ''poorly'', and '' χωριστός'', ''to split'', in referenc ...

Chaetacanthus Pilosus
Chaetacanthus may refer to: * ''Chaetacanthus'' (polychaete), a genus of polychaetes in the family Polynoidae * ''Chaetacanthus'', a genus of plants in the family Acanthaceae, synonym of ''Dyschoriste ''Dyschoriste'' is a genus of flowering plants in the family Acanthaceae. Members of the genus are commonly known as snakeherb. Etymology The name comes from the Greek '' δυσ'', ''poorly'', and '' χωριστός'', ''to split'', in referenc ...

Chaetacanthus Pomareae
Chaetacanthus may refer to: * ''Chaetacanthus'' (polychaete), a genus of polychaetes in the family Polynoidae * ''Chaetacanthus'', a genus of plants in the family Acanthaceae, synonym of ''Dyschoriste ''Dyschoriste'' is a genus of flowering plants in the family Acanthaceae. Members of the genus are commonly known as snakeherb. Etymology The name comes from the Greek '' δυσ'', ''poorly'', and '' χωριστός'', ''to split'', in referenc ...

Phyllodocida
Phyllodocida is an order of polychaete worms in the subclass Aciculata. These worms are mostly marine, though some are found in brackish water. Most are active benthic creatures, moving over the surface or burrowing in sediments, or living in cracks and crevices in bedrock. A few construct tubes in which they live and some are pelagic, swimming through the water column. There are estimated to be more than 4,600 accepted species in the order. Characteristics Phyllodocida are segmented worms and range in size from a few millimetres long to over a metre. Each segment bears a pair of paddle-like parapodia. The prostomium generally has one or two pairs of eyes, a dorsal pair of antennae, a ventral pair of sensory palps and a pair of organs on the neck. The peristomium is a ring, often hidden dorsally by the prostomium and the first segment. There is a muscular proboscis with one or more pairs of jaws. The next few segments tend to differ from those further back in having enlarged do ...
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