Photo Credit: Pixabay/LM1977 5z4857
An intermediate sauropod dinosaur from the Late Jurassic period
A significant discovery has been made in Colorado's Dry Mesa Jurassic period, approximately 155 to 152 million years ago. This new finding contributes valuable insight into the anatomy and evolutionary position of the enigmatic genus, which remains less understood compared to other Morrison Formation dinosaurs like Apatosaurus and Diplodocus.
geologically youngest example of Haplocanthosaurus discovered on the Colorado Plateau.
Haplocanthosaurus is considered a rare genus, known from only 11 specimens compared to the numerous fossils of other Morrison Formation sauropods. Dr. Wedel and his team explained that crucial skeletal elements like the skull and limbs remain either undiscovered or undescribed, leaving gaps in understanding this dinosaur's complete morphology and phylogenetic position. The genus has been variously classified as a basal diplodocoid, a basal macronarian, or just outside Neosauropoda.
This discovery extends the range of Haplocanthosaurus into the Brushy Basin Member of the Morrison Formation. Researchers emphasised the importance of such findings for reconstructing the evolutionary history of sauropod dinosaurs. As new specimens are unearthed, the understanding of these rare Jurassic giants continues to evolve, contributing to broader insights into dinosaur biodiversity during this period.
The findings were attributed to collaborative efforts by paleontologists from institutions including Western University of Health Sciences, Brigham Young University, the Arizona Museum of Natural History, and Auburn University.
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