👉 Allomacrus is a genus of large, long-necked dinosaurs from the Late Cretaceous period. It was found in the Devonian Stage of the Carboniferous period and lived during the late Cretaceous era (68-58 million years ago). The specific name Allomacrus comes from the Greek word "almos" meaning "long," "krym" meaning neck, and "saurus" meaning "jaw."