In the United States are 37 endemic Strumigenys ant species belonging to a single temperate and recently radiated Nearctic clade formerly classified as Pyramica (non-trap jaw Strumigenys Smith¹). We report the discovery of a new unrelated and morphologically distinct endemic Nearctic Strumigenys we described as Strumigenys superstes sp. nov. known only from a single queen collected in a pitfall trap at high altitude in northern Arizona. In comparing Strumigenys superstes sp. nov. morphology with queens of other closely related species, we showed Strumigenys superstes sp. nov. is the only temperate member of the otherwise tropical (Panamanian) clade of short-mandibled trap jaw species formerly belonging to the genus Glamyromyrmex (now forming the Strumigenys excisa species-group).