
Probactrosaurus (meaning "before Bactrosaurus") is an extinct genus of basal hadrosauroid iguanodontian dinosaur that lived in China during the Early Cretaceous period.
Probactrosaurus (meaning "before Bactrosaurus") is an extinct genus of basal hadrosauroid iguanodontian dinosaur that lived in China during the Early Cretaceous period.
==Discovery and species== thumb|left|Mounted fossil In 1959 and 1960 a Soviet-Chinese expedition uncovered the remains of a euornithopod in Inner Mongolia near Maortu. The type species is Probactrosaurus gobiensis, described and named by A. K. Rozhdestvensky in 1966. The generic name refers to Rozhdestvensky's hypothesis that Probactrosaurus would be the direct ancestor of Bactrosaurus, a notion now discarded.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).