Category Archives: Lumping

Is Troodon really Troodon?

Troodon formosus is one of the first dinosaurs from North America ever named. Leidy (1856) described it for a single tooth with denticles on both the anterior and posterior carina. As of now, Troodon material includes the holotype tooth, the foot and caudal … Continue reading

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Grand Old Brontosaurus and the species of Apatosaurus

Brontosaurus excelsus has a history of being a very popular dinosaur, yet many recent studies find it a species of Apatosaurus, A. excelsus. It shows many features that are similar to A. ajax, A. louisae, and A. parvus. However, as was brought up in one … Continue reading

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