Uropod

As the last uropods Pleopodenpaar of crustaceans is called, because it differs in construction from the others.

They are the limbs of the sixth abdominal segment and usually bipartite, ie structured as a split leg in exo-and endopodite. Slightly larger than the exopodite may be divided by a diaeresis, a transverse suture or furrow. Uropods usually have a plate-like, flat shape. Will they fanned out, provide them with the telson the tail fan dar. This can be moved at risk by ventral, powerful blows of Pleons forward so that the cancer abruptly pushed to the back and can escape quickly.

When hermit crabs uropods serve as a holding organs in almost all crab and some Lithodidae the uropods are regressed.