The uncalcified integument at a joint, permitting movement of the exoskeleton, as between the podomeres of a pereiopod [Chace and Hobbs, 1969].
The uncalcified integument, permitting movement of the shell, as between segments of a periopod, or between abdominal somites [Butler, T.H.].
Uncalcified integument of a joint, permitting movement of the exoskeleton, as between the segments of a pereopod [Perez Farfante and Kensley, 1997].
Crustacea glossary. Natural History Museum of Los Angeles County. 2011.