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New dinosaur with duck, Kamuysaurus japonicus, discovered by scientists



The dinosaur, discovered from 72 million years of marine life in northern Japan, belongs to a new genus and species, researchers said.

A partial tail was first discovered in 2013 in the city of Mukawa, Hokkaido, Japan. Later excavations revealed an almost complete skeleton, which is the largest ever found in Japan.

The researchers named the dinosaur Kamuysaurus japonicus.

In this study, a group of researchers led by Professor Yoshitsugu Kobayashi of the Museum of Hokkaido University conducted a comparative study. and phylogenetic analyzes of 350 bones and 70 taxa of hadrosaurids, which allowed them to understand that the dinosaur belonged to the Edmontosaurian clan.

The research team also found that a dinosaur has three characteristics that are not shared by other dinosaurs in its clade. (treasure is a group of organisms thought to have evolved from an ordinary precursor): the low position of the skull bone incision, the short ascending process of the jaw bone, and the anterior inclination of the nerve spines of the sixth to 1

2th dorsal vertebrae.

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  This is a reconstruction of Kauysaurus japonicus. (Kobayashi Y. et al., Scientific Reports, September 5, 2019)

This is a reconstruction of Kauysaurus japonicus. (Kobayashi J. et al., Scientific Reports, September 5, 2019)
(Kobayashi Y. et al., Scientific Reports, September 5, 2019)

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The dinosaur is reported to be 9 years of age and older, measured by eight meters long and weighing four tons (5.3 tons when he was alive)

The study, published in Scientific Reports, also shed light on how the litter evolved and may have migrated, possibly ancestors spread to Asia and North America. [19659012]
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