Spinosarus
Theory (it's possible): https://tetzoo.com/blog/2020/11/27/trope-of-the-buffalo-backed-dinosaur
Theory (it's possible): https://tetzoo.com/blog/2020/11/27/trope-of-the-buffalo-backed-dinosaur
Also the buffalo's spine bones are elongated over it's shoulders, whereas the spinosaurus has elongated spine bones start after its shoulders.