. . "Syndyoceras was named by Barbour (1905). Its type is Syndyoceras cooki. It was assigned to Protoceratidae by Barbour (1905) and Carroll (1988); and to Kyptoceratini by Webb (1981), Prothero (1998), Webb et al. (2003) and Prothero and Ludtke (2007)."@en . "Syndyoceras was named by Barbour (1905). Its type is Syndyoceras cooki. It was assigned to Protoceratidae by Barbour (1905) and Carroll (1988); and to Kyptoceratini by Webb (1981), Prothero (1998), Webb et al. (2003) and Prothero and Ludtke (2007)."@en . . "Syndyoceras"@en . . . .