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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 ...
Trichobothria (singular trichobothrium) are elongate setae ("hairs") present in arachnids, various orders of insects, and myriapods that function in the detection of airborne vibrations and currents, and electrical charge. [1] In 1883, Friedrich Dahl observed that they were deflected by the sound waves from a violin and labelled them 'hearing ...
A general term for a structure by which an object hangs (from Greek language kremastos, meaning "hung up"); for example in entomology: in some Lepidoptera, including most butterflies, the pupa attaches to a surface by the cremaster, a structure at the tip of the pupal abdomen. The cremaster is the homologue of the anal plate of the caterpillar.
Each frustule has four hollow processes called setae, or spines, that allow adjacent cells to link together and form colonies. [2] Colonies can form chains that are coiled, straight, or curved. Cell size can range from <10 um to 50 um. [5] Some species of Chaetoceros produce resting spores that are highly tolerant to adverse conditions. [2]
Serrate setae serve as chemoreceptors or filters to separate out particles during digestion so that digested liquid is more easily absorbed. Plumodenticulate setae also help to filter and move particles along, but could serve to close gaps to keep out unwanted particles.
They may be irregular or align in two or more rows. The number of rows, the number of setae in each row, the size and the thickness are significant. In many groups, the acrostical setae are replaced by setulae or hairs. prescutellar (psc) two acrostical bristles, more developed than the other acrosticals, inserted in front of the scutoscutellar ...
In most species of bees, the scopa is simply a dense mass of elongated, often branched, hairs (or setae) on the hind leg. When present on the hind legs, the modified hairs are, at a minimum, on the tibia, but some bees also have modified hairs on the femur and/or trochanter.
Polychaete annelids (polychaeta literally meaning "many bristles") are named for their chaetae. In Polychaeta, chaetae are found as bundles on the parapodia , paired appendages on the side of the body. [ 1 ]