
Utahraptor ostrommaysi
発音: YOO-tah-RAP-tor os-trom-MAY-zeye
Eudromaeosauria · Dromaeosauridae
The largest known dromaeosaurid, a heavily built "raptor" several metres long from the Early Cretaceous Cedar Mountain Formation of Utah, with a sickle claw over 20 cm long.
- Feathered
- Bipedal
- Sickle claw
- Giant
- Possible pack behavior
- 時代
- 白亜紀· バレミアン期
- 食性
- 肉食
- 全長
- 5.5–7 m
- 体重
- 不明
- 産地
- Utah
クイックアンサー
- Utahraptor ostrommaysiの大きさは?
- Utahraptor ostrommaysiの全長は約5.5–7 mでした。腰の高さは約1.3–1.6 mでした。 (Kirkland et al. 1993; Paul 2010)
- Utahraptor ostrommaysiはいつ生きていた?
- Utahraptor ostrommaysiは白亜紀前期、約1.258億〜1.214億年前に生きていました。 (Cohen et al. 2023; Kirkland et al. 1993)
- Utahraptor ostrommaysiの化石はどこで見つかった?
- Utahraptor ostrommaysiの化石はCedar Mountain Formation (Utah)で見つかっています。 (Kirkland et al. 1993; Paul 2010)
- Utahraptor ostrommaysiは何を食べていた?
- Utahraptor ostrommaysiは肉食でした。 (Kirkland et al. 1993; Paul 2010)
- Utahraptor ostrommaysiは誰がいつ命名した?
- Utahraptor ostrommaysiは1993年にJames I. Kirkland, Robert Gaston & Donald Burgeによって記載されました。 (Kirkland et al. 1993)
このページの内容
YOO-tah-RAP-tor os-trom-MAY-zeye
- 時代
- 白亜紀125.8–121.4 Ma
- 食性
- 肉食
- 全長
- 5.5–7 m
- 体重
- 不明
- 分類
- Eudromaeosauria · Dromaeosauridae
- 記載
- 1993, James I. Kirkland, Robert Gaston & Donald Burge
概要
このコンテンツは英語でご覧いただけます。
Utahraptor ostrommaysi lived in what is now eastern Utah in the Early Cretaceous. Its remains come from the Yellow Cat Member of the Cedar Mountain Formation. James Kirkland, Robert Gaston and Donald Burge named it in 1993, honouring John Ostrom, who first described Deinonychus, and Chris Mays of Dinamation.
It was the giant of the dromaeosaurids: much heavier and longer than Deinonychus, with a huge sickle claw on each foot. Unlike its lighter relatives it had relatively short, strong legs, suggesting it overpowered prey rather than chasing it over long distances.
In 2001 a sandstone block was found near Moab with the bones of several Utahraptor individuals, from adults to juveniles, mixed with an iguanodont. It may be a quicksand trap that caught a group, but the block is still being prepared and the interpretation is open. The age of the Yellow Cat Member is also debated.
名前の意味
"Utah's plunderer", from Utah and Latin raptor; ostrommaysi honours John Ostrom and Chris Mays (Kirkland, Gaston & Burge 1993).
生態と証拠
この動物がどのように暮らしていたかについての科学者の考えと、それぞれの説を支える証拠の強さです。
移動
Utahraptor was built for power rather than speed.
証拠レベル:中程度の証拠Its lower legs are short and stout compared with lighter relatives, which points to strength over endurance running.
賛成・反対の証拠 · 1
支持する証拠
比較解剖学 · Utahraptor robust hind limbs
Shorter, sturdier lower legs and a larger sickle claw than in Deinonychus, suggesting power rather than speed.
標本: CEU 184v.86
羽毛
Utahraptor had feathers.
証拠レベル:強い証拠Feathers are not preserved with it, but they are known in its close relatives on both sides of the family tree.
賛成・反対の証拠 · 1
支持する証拠
系統推定 · Dromaeosaur quill knobs and feathered relatives
Close relatives are preserved with feathers, and Velociraptor shows quill knobs; Deinonychus sits inside this feathered group.
社会性
Utahraptor lived in family groups.
証拠レベル:仮説A block with adults and young together suggests they were together when they died, but the site is still being prepared and a trap could gather unrelated animals.
賛成・反対の証拠 · 1
支持する証拠
標本 · Utahraptor multi-individual block
Several Utahraptor of different ages buried together with a possible prey animal, perhaps trapped in quicksand.
サイズ
- 全長
- 5.5–7 m
- 体高
- 1.5 m文献上の範囲 1.3–1.6 m
- 体重
- 不明
(23 フィート)
(4.9 フィート)
BYU material and Stikes Quarry specimens に基づく
タイムライン
時代: バレミアン期 (125.8–121.4 Ma), 白亜紀前期 (145–100.5 Ma)
Ages are the ICS 2023/09 bounds of the Barremian, the stage(s) the fossils are assigned to; they bracket the record and are not dated first/last appearances. The Yellow Cat Member is usually cited as Barremian, but some dating work suggests it is older (Valanginian-Hauterivian); the range is uncertain.
産地
累層
- Cedar Mountain Formation · Utah
場所
- Gaston Quarry, Grand County, Utah · Cedar Mountain Formation · Utah · 位置はおおよそ
これは化石が見つかった場所で、この動物が暮らしていた範囲全体ではありません。
生態系
生息環境: Yellow Cat
氾濫原, 河川系, その他
Early Cretaceous semi-arid floodplains with seasonal rivers and springs in what is now eastern Utah. Its age is debated.
分類
- クレードDinosauria
- クレードSaurischia
- クレードTheropoda
- クレードCoelurosauria
- クレードManiraptora
- 科Dromaeosauridae
- クレードEudromaeosauria
- 属Utahraptor
- 種Utahraptor ostrommaysi
分類上の地位: 有効
化石記録
| 標本番号 | 種別 | 所蔵機関 | 発見 |
|---|---|---|---|
| CEU 184v.86 | ホロタイプ | Prehistoric Museum, Utah State University Eastern (CEU) | 1991 |
| UGS Utahraptor megablock “Utahraptor megablock” | 参照標本 | Utah Geological Survey (UGS) | 2001 |
見つかった部位
ホロタイプ: CEU 184v.86
- 保存
- 部分的
- 復元
- 不明・未記録
ホロタイプ: CEU 184v.86
部位ごと(表)
| 部位 | 状態 |
|---|---|
| Skull | 不明・未記録 |
| Mandible | 不明・未記録 |
| Teeth | 不明・未記録 |
| Cervical vertebrae | 不明・未記録 |
| Dorsal vertebrae | 不明・未記録 |
| Sacrum | 不明・未記録 |
| Caudal vertebrae | 不明・未記録 |
| Ribs | 不明・未記録 |
| Gastralia | 不明・未記録 |
| Scapula / shoulder girdle | 不明・未記録 |
| Humerus | 不明・未記録 |
| Forearm (radius / ulna) | 不明・未記録 |
| Hand (manus) | 不明・未記録 |
| Pelvis | 不明・未記録 |
| Femur | 不明・未記録 |
| Tibia / fibula | 不明・未記録 |
| Foot (pes) | 部分的 · Second-toe claw. |
参照標本: UGS Utahraptor megablock “Utahraptor megablock”
部位ごと(表)
| 部位 | 状態 |
|---|---|
| Skull | 部分的 |
| Mandible | 不明・未記録 |
| Teeth | 不明・未記録 |
| Cervical vertebrae | 部分的 |
| Dorsal vertebrae | 不明・未記録 |
| Sacrum | 不明・未記録 |
| Caudal vertebrae | 不明・未記録 |
| Ribs | 不明・未記録 |
| Gastralia | 不明・未記録 |
| Scapula / shoulder girdle | 不明・未記録 |
| Humerus | 不明・未記録 |
| Forearm (radius / ulna) | 不明・未記録 |
| Hand (manus) | 不明・未記録 |
| Pelvis | 不明・未記録 |
| Femur | 部分的 |
| Tibia / fibula | 不明・未記録 |
| Foot (pes) | 不明・未記録 |
発見
- 記載年
- 1993
- 記載者
- James I. Kirkland, Robert Gaston & Donald Burge
- タイプ標本
- CEU 184v.86
発見の年表
1991 · 最初の化石の発見
Utahraptor claw found at Gaston Quarry
A giant foot claw is found in the Cedar Mountain Formation of Utah.
人物:Carl Limoni, Robert Gaston
1993 · 正式に記載
Kirkland, Gaston and Burge name Utahraptor
The largest known dromaeosaurid is named, the same year Jurassic Park showed oversized raptors.
人物:James I. Kirkland, Robert Gaston
2001 · 標本の発掘
Utahraptor megablock found
A block with several Utahraptor individuals is found near Moab.
人物:Matt Stikes
出典
- Cohen, K. M., Harper, D. A. T., Gibbard, P. L. & Car, N. (2023). International Chronostratigraphic Chart (v2023/09). International Commission on Stratigraphy. https://stratigraphy.org/ICSchart/ChronostratChart2023-09.pdf(新しいタブで開きます)
- Kirkland, J. I., Gaston, R. & Burge, D. (1993). A large dromaeosaur (Theropoda) from the Lower Cretaceous of eastern Utah. Hunteria 2(10): 1-16.
- Paul, G. S. (2010). The Princeton Field Guide to Dinosaurs. Princeton University Press.
- Paul, G. S. (2016). The Princeton Field Guide to Dinosaurs (2nd edition). Princeton University Press.