Holotype USNM

Xixuthrus sp. Russo, 1930: 141
Xixuthrus domingoensis Fisher, 1932: 1 ([Holotype] Santiago, Dominican Republic. USNM)
Mecosarthron domingoensis ; Ivie, 1985: 246 (Lingafelter & Woodley, 2007: 173)
Xixuthrus (Xixuthrus) domingoensis ; Santos-Silva & Lingafelter, 2012: 318