Probactrosaurus  - Meaning : before Bactrosaurus

Probactrosaurus (proh-bak-troh-sore-us) was an early hadrosauroid iguanodont. It lived in China during the Early Cretaceous Period. The type species is Probactrosaurus gobiensis, described by Rozhdestvensky in 1966. It was a herbivorous dinosaur, about 17 - 20 feet (5 - 6 metres) in length.

It had a narrow snout, an elongated lower jaw and double rows of flattened cheek teeth. It was a possible ancestor of the duck-billed dinosaurs.

Probactrosaurus was a herbivorous dinosaur and was active during the Aptian-Albian age.