Morphology, evolution and usage of urticating
setae by tarantulas (Araneae: Theraphosidae).
Abdomen uniformly coloured, with two pale dorsolateral stripes of urticating
setae (Figures 6f, 6g, Kaderka 2015: figures 7, 19, 28).
On these occasions, several individuals would loosen up from the host plant and contort their bodies aggressively, probably to intimidate the aggressor and to facilitate inoculation of urticating
substances present in their urticating
This is the first report of urticating
caterpillars on blueberry in Brazil; it was also examined the biology of this insect under laboratory conditions.
Individuals of this family have defense structures with bristles that inject urticating
substances and provoke burns in mammals (Fornes and Hernandez, 2001; Gouvcia et al., 2005; Lorini et al., 2007).
The bite can be painful and the surrounding tissue may itch and have a rash due to the urticating
hairs of the spider.
One of these contained 24 of the 25 urticating-hair specimens (in the genera Aphonoplema and Avicularia) in addition to 17 of those from genera that lacked urticating
Eleven cuticular fragments of tarantulas (large setae, urticating
hairs, segments from palps, front legs, and anterior region of cephalothorax) were found in the fecal samples examined, indicating that N.
Hidden within that fuzzy coat is a thicket of short, hollow spines (urticating
hairs) that have been likened to tiny hypodermic needles.
However, only one queen located the prostoma, and in that case, the stiff, erect, and urticating
hairs prevented her from opening the stem at the prostoma.
multiple reddish brown maculae urticating
Immediate deterrence is enhanced by the use of weapons, such as stings, jets of noxious fluid, or urticating
hairs, by the storage of toxins near the body surface or in relatively expendable parts such as wings (Benson, 1971; Boyden, 1976), or by having a tough cuticle (Poulton, 1890; Fisher, 1930; Sundberg, 1987) or shell (Rosenberg, 1989).