Ander, KjellSander, BarbaraJudge, Kevintranslated.com2021-01-112022-05-312022-05-312021-01-11This is a translated version of the following article: Ander, K. (1938). Ein abdominales Stridulationsorgan bei Cyphoderris (Prophalangopsidae) und über die systematische Einteilung der Ensiferen (Saltatoria). Opuscula Entomologica, 3, 32-38.https://hdl.handle.net/20.500.14078/2117Ensiferan insects (crickets, katydids, grigs and allies) are well known for rubbing parts of their cuticle together to produce sound: a process called stridulation. In this article Swedish entomologist Kjell Ander describes a novel (at the time) stridulatory apparatus in the great grig, Cyphoderris monstrosa (Prophalangopsidae), a relict ensiferan found in the mountainous regions of western North America. Ander used preserved specimens to predict the sound-producing function of a pair of abdominal file-scraper apparatuses, although he was never able to directly test his proposed mechanism nor did he speculate as to the adaptive significance of the structures. The article concludes with a review of the systematic placement of various higher level taxa within the order Orthoptera, of which Ensifera is one suborder.enAll Rights Reservedsound production of insectsCyphoderrisstridulatory organArticlehttps://doi.org/10.31542/r.gm:2687