Sound-producing organ formed by interacting areas of regularly ridged or beaded integument (e.g. paired chelipeds in Strigopagurus or cheliped and carapace in ocypodids) [Poore, 2004].
Structure in which two parts of exoskeleton are rubbed together in order to produce sound, one part consisting of ridge or tuberculate or cross-ridged surface which is apposed to another part usually having single transverse ridge or tubercle [Moore and McCormick, 1969].
Structure producing sound by 2 parts of exoskeleton being rubbed together; surface with ridge or tubercles or cross-ridges surface and opposing surface with single transverse ridge or tubercle [McLaughlin, 1980].
Crustacea glossary. Natural History Museum of Los Angeles County. 2011.