 Later agoniatitid ammonoids would die out in the Taghanic event in the upper middle Givetian.Goniatite ammonoids would give rise to further ammonoid orders, thus starting ammonoid dominance of marine fossils in further periods until their end at the Cretaceous-Paleogene mass extinction event.In North America the Emsian Stage is represented by Sawkill or Sawkillian time.