アウロルニス シュイ
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| The geological age | |||||||||||||||||||||||||||
| Jurassic - Jurassic | |||||||||||||||||||||||||||
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| Aurornis xui Godefroit et al.,, 2013 [1] |
アウロルニス シュイ [2] (Aurornis xui[1]) One kind of the dinosaur belonging to the dragon board eyes which inhabited Ochs four Deanne in とは, the Jurassic 60 million years before approximately 100 million. It is a genotype of アウロルニス genus (Aurornis). With the opinion estimating that is the earliest birds [2].
Table of contents
Summary
It was a fossil excavated from the stratum of the generation 65 million years before 100 million for approximately 153 million years of 髫髻山層 () in People's Republic of China Liaoning in 2013, and アウロルニス シュイ was discovered by Pascal Godefroit of the researcher having purchased what a local dealer sold. It is not a rare thing a researcher purchases a fossil, and to study, but it is fraught with the risk that cannot measure the tidy generation, and a fossil may be forged. At first, from the structure of the complicated rib, I confirmed that forged trace was low. On top of that, I checked a fossil and was registered as a new kind [3]. The state of preservation of the fossil was good and was discovered as a dinosaur having a feather because the trace of the feather existed [2]. Generic name "Aurornis" is touched in combination of "aurora" and "ornis" meaning a bird in Greek, specific epithet "xui" meaning "the daybreak" in Latin in the study of early birds in honor of famous 徐星 (Xu Xing) [3].
It is thought that the size estimated by a fossil is a small creature with size of approximately 50cm like the pheasant. Because a big feather does not exist, it is thought that I was not able to fly [3].
Is it immediate early birds?
Claim
The study team of Pascal ゴドフロア and others insisted that アウロルニス シュイ was an immediate early figure of birds from the characteristic of the fossil of アウロルニス シュイ. It was in the old times and, in the habitation generation of アウロルニス シュイ, was considerably far geographically with Europe where archaeornises inhabited again from archaeornis (Archaeopteryx) estimated that similarly it was early birds for approximately approximately 10 million years, but estimated it when closely related each other [2]. But the characteristic of the bone was more primitive than an archaeornis [3]. From this, I estimated that アウロルニス シュイ was located in the earliest birds which inhabited in the times when it was older than an archaeornis [2].
Objection, argument
As for the immediate early creature of birds, there are plural opinions for a story called something, and there are many objections for them, too. Three kinds really resemble a loser, birds and the characteristic from the system of birds with an archaeornis and close relation and a アンキオルニス hack lei (Anchiornis huxleyi) that estimates it, and is estimated when similarly it is closely related for the cause, but insist on a characteristic of シャオティンギア ゼンギ (Xiaotingia zhengi) where 徐 and others discovered the study team of 徐星 and others in the same year in 2011 equal to two years ago if the デイノニコサウルス (Deinonychosauria) system which is the dinosaur which is not birds is near. Furthermore, I insist on the system of birds when I evolved from a system near エピデクシプテリクス フーイ (Epidexipteryx hui) not デイノニコサウルス. Wow, it is argued against this claim Michael Lee and トレバー by she [2].
Because it extremely resembles that all the dinosaur fossils having a feather are extremely primitive anatomically that a claim is opposed in this way, it comes from that what I place closely whether it is a system of デイノニコサウルス because a certain kind is the system of birds is difficult. When there remains the possibility not to belong to birds defined as an archaeornis by the common ancestor of birds doing the existing life although the ancestor of birds is near, Lewis チアッペ insists on アウロルニス シュイ. Therefore, it is thought that I am in position that is equal in other close species without being settled whether it is different from the birds because アウロルニス シュイ is immediate early birds. However, because there are a thing, the time when a dinosaur having a large number of feathers is discovered in this way during approximately 150 million years ago for approximately 160 million years, it is in a condition not to be able to doubt the claim itself that the birds evolved from a dinosaur, and it is thought that those one existing plural might evolve to birds doing the existing life [2].
Source
Allied item
This article is taken from the Japanese Wikipedia アウロルニス シュイ
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