Yamatosaurus

Yam-ah-toe-sor-us.
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Benjamin Gutierrez

Vertebrate Paleontologist

Benjamin Gutierrez is a leading expert on dinosaurs, particularly the mighty theropods. His fieldwork in South America has uncovered new species and provided insights into dinosaur social structures.

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Name

Yamatosaurus ‭(‬Yamato lizard‭).

Phonetic

Yam-ah-toe-sor-us.

Named By

Yoshitsugu Kobayashi,‭ ‬Ryuji Takasaki,‭ ‬Katsuhiro Kubota‭ & ‬Anthony R.‭ ‬Fiorillo‭ ‬-‭ ‬2021.

Classification

Chordata,‭ ‬Dinosauria,‭ ‬Ornithischia,‭ ‬Ornithopoda,‭ ‬Hadrosauridae.

Diet

Herbivore.

Species

Y.‭ ‬izanagii‭

Size

Uncertain due to lack of remains,‭ ‬but very roughly estimated to be about‭ ‬7.5‭ ‬meters long.

Known locations

Japan,‭ ‬Awaji Island‭ ‬-‭ ‬Kita-Ama Formation.

Time Period

Early Maastrichtian of the Cretaceous.

Fossil representation

Partial right dentary‭ [‬jaw‭]‬,‭ ‬teeth,‭ ‬cervical‭ (‬neck‭) ‬vertebrae and cervical ribs,‭ ‬partial coracoid‭ (‬shoulder‭) ‬and caudal‭ (‬tail‭) ‬vertebrae.

In Depth

       Yamatosaurus is a‭ ‬genus of hadrosaurid dinosaur that lived in Japan during the late Cretaceous.‭ ‬Yamatosaurus is considered to be a more primitive form of hadrosaur,‭ ‬and the discovery of this dinosaur seems to portray a picture of more basal hadrosaur forms existing in East Asia all the way into the late Cretaceous,‭ ‬even when more advanced hadrosaur forms were present throughout the lands.‭ ‬In the case of Yamatosaurus this differentiates the genus from other hadrosaur genera discovered in Japan such as Kamuysaurus even though the two genera existed at roughly the same time as one another.

Further reading

-‭ ‬A new basal hadrosaurid‭ (‬Dinosauria:‭ ‬Ornithischia‭) ‬from the latest Cretaceous Kita-ama Formation in Japan implies the origin of hadrosaurids.‭ ‬-‭ ‬Scientific Reports.‭ ‬11‭ (‬1‭)‬.‭ ‬-‭ ‬Yoshitsugu Kobayashi,‭ ‬Ryuji Takasaki,‭ ‬Katsuhiro Kubota‭ & ‬Anthony R.‭ ‬Fiorillo‭ ‬-‭ ‬2021.

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