Systolosoma is a genus of beetles and one of two extant genera in the family Trachypachidae, containing two species, Systolosoma breve and Systolosoma lateritium, which are endemic to Chile and Argentina
References
George E. Ball, "Trachypachidae", in Ross H. Arnett, Jr. and Michael C. Thomas, American Beetles (CRC Press, 2001), vol. 1