Symphylans are small soil-dwelling myriapods that resemble centipedes, but are smaller and translucent. They can move rapidly through the spaces between soil particles, and are typically found from the surface down to a depth of about 50 cm. The body is soft and without pigment. Symphylans range from 2-30 millimetres long and have two body regions: a head and segmented trunk. The head has long, segmented antennae, a postantennal organ and three pairs of mouth-parts:
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