Loose soil
They insert their anterior tip into a pore, extend their setae to anchor most of their body and then exert radial and longitudinal pressure. A cycle of alternating contractions and relaxations thrusts their body forward.
Dense soil
They invert their pharynx, exude lubricating mucus and suck obstructive soil into their body.
jim items answered the question on February 18, 2019 at 07:24
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