.84" Very Rare Basal Sauropod (Spinophorosaurus) Tooth - Niger

Spinophorosaurus was a sauropod, or long-necked dinosaur, from the middle Jurassic period of Niger, 136 million years ago. This large animal measured 43 feet in length from the end of its nose to the tip of its tail, and weighed an estimated 7 tons. As far as larger sauropods go, Spinophorosaurus exhibited a variety of more basal traits in the sauropod family tree; these include a smaller braincase shaped more similarly to primitive sauropods, as well as adjustments to the shape of the vertebrae to lengthen the rear half of the body. Like all other sauropods, it was an herbivore that had little to fear from large predators at adult size.