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. ==Morphology== ... Found on http://en.wikipedia.org/wiki/Trichobothria
1) Arachnid anatomy 
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. ==Morphology== ...