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New dinosaur species found: Kamuysaurus japonicus – a plant-eating adrosaurus – found in Japan



A new type of dinosaur has been discovered in Japan and it is the largest dinosaur skeleton ever discovered in the country. Researchers believe the bones help explain the origin and evolution of dinosaurs in the region.

The dinosaur is a whole new genus and species of the herbivore hadosaurus that roamed the Earth at the end of the Cretaceous more than 65 million years ago. Its skeleton has been discovered below 72 million marine fields in the city of Mukawa, according to a study by researchers at Hokkaido University, published in Scientific Reports.

The first dinosaur remains were discovered in 201

3 when scientists discovered a partial tail of a reptile. Further excavations have revealed an almost complete skeleton – the largest ever found in Japan.

  fig3-fossilized-skeleton-1024x452.jpg
The fossilized skeleton of Kamuysaurus japonicus was first discovered in the Hobetsu region of Mukawa, Hokkaido, in 2013. During long excavations, an almost complete skeleton (above) was discovered. which is currently the largest dinosaur skeleton ever discovered in Japan.

Hokkaido University


The dinosaur was named Millavary after the excavation site, but later scientists gave it a correct classification, Kamuysaurus japonicus, which means the deity of the Japanese dinosaurs.

An analysis of 350 bones and 70 taxa of Hadrosaurus has determined that the dinosaur belongs to the Edmontosaurini clan and is closely related to Kerberosaurus fossils found in Russia and Laiyangosaurus found in China.

Kamuysaurus japonicus has several unique features that set it apart from other dinosaurs with which it is closely related. The cranial slit is located lower, the jaw bone is particularly short, and a short row of spines on the back is more inclined than others, the researchers found.

  fig1-kamuysaurus-japonicus-1024x710.jpg "height =" 430 "width =" 620 "class =" lazyload "data-srcset =" https://cbsnews1.cbsistatic.com/hub/i/r/2019 /09/06/8ffe18b7-1bf3-475c-8453-6736c2861cfc/thumbnail/620x430/d5c151f1887ec5e10f137853ef68abd1/fig1-kamuysaurus-japonicus-1024x710.jpg 1x, https://cbsnews3.hbsatic.com/cubic.com/cubist.com/ubs 6.9 / 8ffe18b7-1bf3-475c-8453-6736c2861cfc / image / 1240x860 / f73ba0ebb604fc7f60a1b9b429dcbab5 / fig1-kamuysaurus-japonicus-1024x710.jpg 2x &%% 3G,% x%% 3D / SVG,% xx% x% SVG; % 3A% 2F% 2Fwww.w3.org% 2F2000% 2Fsvg & # 39;% 20viewBox% 3D & # 39; 0% 200% 20620% 20430 & # 39;% 2F% 3E "/> </span><figcaption class= Reconstruction of japonicus Kamuysaurus ( Kobayashi Y. et al, Scientific Reports, September 5, 2019)

Hokkaido University


According to researchers, the dinosaur is an adult measuring 8 meters (over 26 feet) in size. They estimated his weight was either about 4.5 tons in the US if he walked on two legs, or 5.8 tons in the USA if he walked on all fours.

The study helps to connect the dots with the origin of the Edmontosaurini dinosaur clan and how it may have migrated through North America to Asia, which at that time were related to present-day Alaska.

Studies also suggest that dinosaur ancestors preferred coastal areas, a rare dinosaur habitat during this period. Ocean habitat may have played an important role in the diversification of Hadrosaurus in its early evolution.


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