(Zhang Heng’s dragon).
Named By: Xing Hai, Wang Deyou, Han Fenglu, Corwin Sullivan, Ma Qingyu, He Yiming, David Hone, Yan Ronghao, Du Fuming & Xu Xing - 2014.
Classification: Chordata, Reptilia, Dinosauria, Ornithischia, Ornithopoda, Hadrosauroidea.
Species: Z. yangchengensis (type).
Size: Holotype roughly estimated at somewhere between 5.5 and 6 meters long.
Known locations: China, Henan Province, Xixia County - Majiacun Formation.
Time period: Santonian of the Cretaceous.
Fossil representation: partial remains including right maxilla (tooth bearing bone of the skull), right jugal and right dentary (lower left jaw bone). Post cranial remains including dorsal (back) vertebrae, ribs, shoulder and ulna (lower forearm bone) have also been attributed to the genus.
was described at the time of its description as a non-hadrosaurid
hadrosauroid, which translated into simpler terms is a primitive
Hadrosauroids like Zhanghenglong were
descended from the
older iguanodont ornithopods that rose to prominence during late
Jurassic and early Cretaceous. By the earlier stages of the late
cretaceous that had evolved into the hadrosauroids like Zhanghenglong,
which by the later stages of the Late Cretaceous would develop into
hadrosaurids. Though not much is known, the fossils of
Zhanghenglong show that as a genus Zhanghenglong
would have still been
transitional in form between hadrosauroids and hadrosaurids, with a
couple of known hadrosaurid features, though still not enough to see
it classified as a hadrosaurid.
Zhanghenglong was named after the Chinese scientist Zhang Heng who lived in China during the first century. The ‘long' part of the name is the Mandarin word for ‘dragon'. Other dinosaurs that Zhanghenglong may have encountered include the troodontid Xixiasaurus and the alvarezsaur Xixianykus.
- A New Basal Hadrosauroid Dinosaur (Dinosauria: Ornithopoda) with Transitional Features from the Late Cretaceous of Henan Province, China. - PLoS ONE 9 (6): e98821 - Xing Hai, Wang Deyou, Han Fenglu, Corwin Sullivan, Ma Qingyu, He Yiming, David Hone, Yan Ronghao, Du Fuming & Xu Xing - 2014.