👉 Gelanesaurus was a genus of dinosaur that lived during the Cretaceous period, approximately 68-66 million years ago. It is considered a basal member of the Diplodocus family and a sauropod dinosaur. Gelaesaurus had a long neck with two large horns and a powerful jaw. The species is known for its distinctive skull features that included a distinct triangular roof to cover the eyes, which were later replaced by a more rounded shape in the fossil record.