Dicraeosauridae A clade in the dinosaur family tree. The entries below are classified within it. Athenar bermani 163–145 Mya · United States Dicraeosaurus 163–145 Mya · Tanzania Dyslocosaurus polyonychius 163–145 Mya · North America Brachytrachelopan 160–150 Mya · South America Suuwassea emilieae 156.3–146.8 Mya · United States Smitanosaurus 155.7–145.5 Mya · Colorado, USA Kaatedocus siberi 155 Mya · United States Bajadasaurus 145–132.9 Mya · Asia Pilmatueia faundezi 145–100 Mya · South America Amargasaurus 130–120 Mya · Argentina Amargatitanis 129.4–123 Mya · Argentina