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Setae on the foreleg of a mayfly. Annelid setae are stiff bristles present on the body. They help, for example, earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs make it difficult to pull a worm straight from the ground. Setae in oligochaetes (a group including earthworms) are largely composed of ...
Preening brush: a dense cluster of setae near the ventral tip of the posterior metatarsi; called a preening comb when present as a transverse row of setae. [22] Procurved: Used to describe a structure which is curved in such a way that the outer edges are in front of the central part; [22] opposite recurved
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 ...
The second antennae in the burrowing Hippoidea and Corystidae have setae that interlock to form a tube or "snorkel" which funnels filtered water over the gills. [ 6 ] A spiny lobster , showing the enlarged second antennae
Lepidoptera have some of the most complex genital structures of all insects, with a wide variety of complex spines, setae, scales and tufts in males, claspers of different shapes and modifications of the ductus bursae in females, through which stored sperm is transferred within the female directly, or indirectly, to the vagina for fertilisation.
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.
Arthropods are covered with a tough, resilient integument, cuticle or exoskeleton of chitin.Generally the exoskeleton will have thickened areas in which the chitin is reinforced or stiffened by materials such as minerals or hardened proteins.
More aggressive self-defense measures have evolved in some caterpillars. These measures include having spiny bristles or long fine hair-like setae with detachable tips that will irritate by lodging in the skin or mucous membranes. [6] However some birds (such as cuckoos) will swallow even the hairiest of caterpillars. Other caterpillars acquire ...