Tumblr inline oefv3znMoq1rx4yme 500
An artist's illustration of Microhadrosaurus nanshiungensis
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
clade: Dinosauria
Order: Ornithischia
Suborder: Ornithopoda
Infraorder: Iguanodontia
Superfamily: Hadrosauroidea
Family: Hadrosauridae
Genus: Microhadrosaurus
Dong, 1979
Species: M. nanshiungensis
Binomial name
Microhadrosaurus nanshiungensis
Dong, 1979

Microhadrosaurus (meaning "small sturdy lizard" in Greek) is a genus of duckbill dinosaur from the Campanian or Maastrichtian-age Upper Cretaceous Yuanpu Formation (also known as the Nanxiong Formation) of Guangdong, China. Although its name identifies it as a small duckbill, it is based on juvenile remains, and the size of the adult hadrosaur is unknown.


Dong Zhiming named this genus for IVPP V4732, a partial lower jaw from a juvenile hadrosaur. This partial bone, with 18 columns of stacked teeth in a typical hadrosaur tooth battery, measures 37 centimeters long (15 inches). Dong later estimated the length of the individual at 2.6 meters (8.5 feet).


Dong regarded this genus as much like Edmontosaurus, albeit in tiny form. However, Michael K. Brett-Surman, a hadrosaur specialist, regarded the material as showing no characteristics that would allow it to be differentiated from other duckbills. The most recent review accepts Brett-Surman's position, and regards Microhadrosaurus as a dubious name.


As a hadrosaurid, Microhadrosaurus would have been a bipedal/quadrupedal herbivore, eating plants with a sophisticated skull that permitted a grinding motion analogous to chewing, and was furnished with hundreds of continually-replaced teeth. Because it is only known from a partial jaw from a juvenile, little more than general information can be drawn from it at this point.