Complex sentence: Trichobothria (singular trichobothrium) are elongate setae that function in the detection of airborne vibrations and currents, they have the same gauge on all their extent.
Split into simpler sentences: Trichobothria (singular trichobothrium) are elongate setae that function in the detection of airborne vibrations and currents. Unlike the ordinary setae, which are tapered, the trichobothria have the same gauge on all their extent.