{"data":[{"source":"bio.acousti.ca","id":"47620","topic":"behaviour","value":"A putative stridulatory apparatus on the mouth- parts of cylindrachetids was described and figured by G \u0327nther (1992) and Rentz (1996). It consists of a field of microscopic tubercles arranged in rows on the ventral surface of each mandible and a single row of about seven short ridges on the opposing dorsal surface of the basal segment of each maxillary palpus. G \u0327nther noted this apparatus in both sexes. It is now clear that it occurs in all nymphal instars as well. Thus, it is unlikely that the apparatus plays a part in mate-attraction, if in fact it produces sound at all. I detected no stridulatory sounds from sandgropers, even when holding them close to my ear.","topic_link":"http:\/\/rs.tdwg.org\/ontology\/voc\/SPMInfoItems#Behaviour","info_url":"https:\/\/bio.acousti.ca\/node\/47620"}]}