A
chaeta or cheta (see spelling differences ) is a chitin ous bristle or seta found on an insect , arthropod or annelid worms such as
Kaynak: ChaetaEach body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called
chaeta e, which are made of chitin .
Kaynak: PolychaeteMost of an annelid's body consists of segments that are practically identical, having the same sets of internal organs and external
chaetaKaynak: AnnelidOn the legs I distinguish a front
chaeta- and a hind-side ; an upper- and an under-side. When we imagine the leg stretched out
Kaynak: Josef MikThe etymology of the genus name derives from Greek: Penta five +
chaeta bristle, referring to the pappus scales of P. aurea .
Kaynak: PentachaetaMost have prolonged teeth on the
chaeta l blades. 5 genera are placed in the Psamathini with certainty, and three further ones are often
Kaynak: PsamathiniThe main distinguishing feature of this species is the presence of five (rather than three or four in other Homidia species) macro
chaetaKaynak: Homidia pentachaetaIn most species the edge of the mantle also bears movable bristles, often called
chaeta e or setae , that may help defend the animals and
Kaynak: BrachiopodSetae in entomology are often called hairs or
chaeta e. They are unicellular and formed by the outgrowth of a single epidermal cell
Kaynak: Setais a crawling animal, when it becomes an epitoke the worm develops swimming appendages, such as broad parapodia with paddle-shaped
chaeta e.
Kaynak: EpitokyThe worm has about one hundred segments each bearing chitin ous bristles called
chaeta e. There are twelve to nineteen pairs of tentacles
Kaynak: Hydroides norvegicaThere are also a small number of simple
chaeta e or bristles on each segment. Distribution: Haplosyllis spongicola has a cosmopolitan
Kaynak: Haplosyllis spongicolaThe
chaeta e are unbranched capillaries, spines and hooks. Families : Aberrantidae Apistobranchidae Mesnil and Caullery, 1898 Chaetopteridae
Kaynak: SpionidaThere are a large number of hooked
chaeta e or bristles on a small pad on the ventral side of each segment. These chaetae have two
Kaynak: OweniidaePosterior to the trunk is the short metamerically segmented opisthosoma , bearing external paired
chaeta e, which apparently help to
Kaynak: SiboglinidaeThere are 14 to 15 ventral shields on the thorax and there are
chaeta e on all the segments from 4 onwards. Distribution: E. nebulosa occurs in
Kaynak: Eupolymnia nebulosafrom those further back in having enlarged dorsal and ventral cirri (fine appendages) and reduced parapodial lobes and
chaeta e (bristles).
Kaynak: PhyllodocidaThe anterior fifteen body segments each bear
chaeta e or bristles, projecting laterally. These grow from a massive base and have six to
Kaynak: Lagis koreni