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Setae on the legs of krill and other small crustaceans help them to gather phytoplankton. It captures them and allows them to be eaten. Setae on the integument of insects are unicellular, meaning that each is formed from a single epidermal cell of a type called a trichogen, literally meaning "bristle generator". They are at first hollow and in ...
Calamistrum (plural calamistra): Modified setae (bristles) on the metatarsus of the fourth leg of spiders with a cribellum, arranged in one or more rows or in an oval shape, used to comb silk produced by the cribellum; see also Calamistrum; Caput (plural capita): see cephalic region
The tip of the tarsus bears claws, which vary in number and size. Spiders that spin webs typically have three claws, the middle one being small; hunting spiders typically have only two claws. Since they do not have antennae, spiders use specialised and sensitive setae on their legs to pick up scent, sounds, vibrations and air currents. [6]
supralar (postsutural) (sa) these setae are limited in number, and located from the prealar callus to the supralar area. postalar (pa) limited in number, they are located on the postalar callus near the lateral margin of the scutum behind the insertion of the wing. scutellar (psct) bristles on the scutellum. They may be marginal or on the ...
being like or having the nature of a seta or of setae; setose; setose bearing, or covered in setae. setula Diminutive of seta. A small chitinous hair or bristle. setulose bearing, or covered in setulae. shade see central shade spiracle Respiratory openings on the thorax and abdomen that allow air to enter the trachea. sporophagy feeding on ...
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In some species, the setae are hollow, connecting to venom-producing cells, like a hypodermic needle. Generally, setae are only externally irritating, but may be more dangerous if contact is made with mucous membranes or if ingested; some can cause severe skin necrosis, eczema-like symptoms and shedding.
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