
Styracosaurus albertensis
発音: sty-RAK-oh-SORE-us al-ber-TEN-sis
Ceratopsia · Ceratopsidae
A horned dinosaur from the Late Cretaceous of Alberta, Canada, with a long nose horn and a crown of long spikes on its neck frill. About 5 to 5.5 m long, it browsed low plants on the coastal plains of the Dinosaur Park Formation.
- Horned
- Quadrupedal
- 時代
- 白亜紀· カンパニアン期
- 食性
- 植物食
- 全長
- 5–5.5 m
- 体重
- 1,800–2,700 kg
- 産地
- Alberta, Canada
クイックアンサー
- Styracosaurus albertensisの大きさは?
- Styracosaurus albertensisの全長は約5–5.5 mでした。腰の高さは約1.8 mでした。体重は約1.8–2.7 tでした。 (Wikipedia: Styracosaurus 2026)
- Styracosaurus albertensisはいつ生きていた?
- Styracosaurus albertensisは白亜紀後期、約7580万〜7510万年前に生きていました。 (Paleobiology Database: Styracosaurus alberten… 2026; Eberth et al. 2023)
- Styracosaurus albertensisの化石はどこで見つかった?
- Styracosaurus albertensisの化石はDinosaur Park Formation (Alberta)、Canadaで見つかっています。 (Lambe 1913; Ryan et al. 2007)
- Styracosaurus albertensisは何を食べていた?
- Styracosaurus albertensisは植物食でした。 (Lambe 1913; Ryan et al. 2007)
- Styracosaurus albertensisは誰がいつ命名した?
- Styracosaurus albertensisは1913年にLawrence M. Lambeによって記載されました。 (Lambe 1913; Paleobiology Database: Styracosaurus alberten… 2026)
このページの内容
- 時代
- 白亜紀75.8–75.1 Ma
- 食性
- 植物食
- 全長
- 5–5.5 m
- 体重
- 1.8–2.7 t
- 産地
- Canada
- 分類
- Ceratopsia · Ceratopsidae
- 記載
- 1913, Lawrence M. Lambe
概要
このコンテンツは英語でご覧いただけます。
Styracosaurus albertensis lived about 75 million years ago on the coastal plains of what is now southern Alberta, Canada. Charles H. Sternberg found its first skull on the Red Deer River in 1913, and Lawrence Lambe named it the same year; the rest of the skeleton was dug out of the same quarry in 1935.
It was a centrosaurine ceratopsid, a relative of Centrosaurus and more distantly of Triceratops, with a single long nose horn, small brow horns and four to six long spikes along the back of its frill. A subadult skull described by Brown, Holmes and Currie (2020) shows that the frill spikes grew much longer and thicker as the animal matured, while their position stayed the same.
Its beak and rows of shearing cheek teeth were suited to slicing tough plants. Styracosaurus is relatively rare in the Dinosaur Park Formation, where it lived alongside other horned dinosaurs, duck-billed hadrosaurs and tyrannosaurs such as Gorgosaurus.
名前の意味
"Spiked lizard", from Greek styrax (the spike at the butt of a spear) and sauros; albertensis for the province of Alberta (Lambe 1913).
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。
成長
The frill spikes of Styracosaurus grew much longer as it matured.
証拠レベル:強い証拠Young skulls have short, flat, triangular spikes; in adults they are long and thick, while their position on the frill stays the same.
賛成・反対の証拠 · 1
支持する証拠
標本 · Subadult Styracosaurus skull and growth series
A complete skull of the smallest known Styracosaurus (about 80% adult size) compared with adult skulls and bonebed material: the parietal spikes lengthen and thicken through growth but keep their position.
行動
The horns and frill of Styracosaurus were used mainly for display.
証拠レベル:仮説Their late growth and variability fit signalling to other Styracosaurus; defence and combat have also been proposed.
賛成・反対の証拠 · 1
支持する証拠
標本 · Subadult Styracosaurus skull and growth series
A complete skull of the smallest known Styracosaurus (about 80% adult size) compared with adult skulls and bonebed material: the parietal spikes lengthen and thicken through growth but keep their position.
社会性
Styracosaurus lived in herds.
証拠レベル:仮説Bonebeds of several individuals suggest group living, as in other centrosaurines, but they can also form by other causes.
賛成・反対の証拠 · 1
支持する証拠
標本 · Styracosaurus bonebed
A bonebed with remains of several individuals in the Dinosaur Park Formation.
サイズ
- 全長
- 5–5.5 m
- 体高
- 1.8 m
- 体重
- 1,800–2,700 kg
(18 フィート)
(5.9 フィート)
タイムライン
時代: カンパニアン期 (83.6–72.1 Ma), 白亜紀後期 (100.5–66 Ma)
Prosaurolophus maximus-Styracosaurus albertensis assemblage zone of the Dinosaur Park Formation, 75.77-75.10 Ma (U-Pb age model, Eberth et al. 2023); the Onefour specimens fall within the same range. The whole formation spans 76.47-74.44 Ma.
産地
累層
- Dinosaur Park Formation · Alberta
- RTMP Quarry 16, below Happy Jack Ferry, Red Deer River · Dinosaur Park Formation · Alberta · 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: Dinosaur Park
76.5–74.4 百万年前 · 氾濫原, 海岸平野, 河川系
Late Campanian alluvial and coastal plains on the western shore of the Western Interior Seaway, in what is now southern Alberta.
分類
- クレードDinosauria
- クレードOrnithischia
- クレードCeratopsia
- 科Ceratopsidae
- 亜科Centrosaurinae
- 属Styracosaurus
- 種Styracosaurus albertensis
分類上の地位: 有効
化石記録
| 標本番号 | 種別 | 所蔵機関 | 発見 |
|---|---|---|---|
| CMN 344 | ホロタイプ | Canadian Museum of Nature (CMN) | 1913 |
見つかった部位
ホロタイプ: CMN 344
- 保存
- 部分的
- 復元
- 不明・未記録
部位ごと(表)
| 部位 | 状態 |
|---|---|
| Skull | 保存 |
| Mandible | 保存 |
| 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) | 不明・未記録 |
発見
- 記載年
- 1913
- 記載者
- Lawrence M. Lambe
- タイプ標本
- CMN 344
発見の年表
1913 · 正式に記載
Lambe names Styracosaurus albertensis
Lawrence Lambe names the "spiked lizard" in The Ottawa Naturalist.
人物:Lawrence M. Lambe
1913 · 最初の化石の発見
Charles H. Sternberg finds the Styracosaurus skull
A nearly complete skull is found on the Red Deer River during a Geological Survey of Canada expedition.
人物:Charles H. Sternberg
1935 · 標本の発掘
Rest of the Styracosaurus type skeleton excavated
Levi Sternberg returns to the quarry and collects the lower jaw and skeleton of the same individual.
人物:Levi Sternberg
2020 · 主要な研究
Subadult Styracosaurus described
Brown, Holmes and Currie describe the smallest known Styracosaurus and its growth.
人物:Caleb M. Brown
出典
- (2026). Paleobiology Database: Styracosaurus albertensis occurrences and type collection 52487. The Paleobiology Database (paleobiodb.org), data service 1.2, accessed 2026-09-23. https://paleobiodb.org/data1.2/occs/list.txt?taxon_name=Styracosaurus%20albertensis&show=coords,paleoloc,strat,loc,ref&pgm=gplates(新しいタブで開きます)
- (2026). Wikipedia: Styracosaurus. Wikipedia (English), accessed 2026-09-24. https://en.wikipedia.org/wiki/Styracosaurus(新しいタブで開きます)
- Brown, C. M., Holmes, R. & Currie, P. J. (2020). A subadult individual of Styracosaurus albertensis (Ornithischia: Ceratopsidae) with comments on ontogeny and intraspecific variation in Styracosaurus. Vertebrate Anatomy Morphology Palaeontology 8: 67-95. doi:10.18435/vamp29361(新しいタブで開きます)
- Eberth, D. A., Evans, D. C., Ramezani, J., Kamo, S. L., Brown, C. M., Currie, P. J. & Braman, D. R. (2023). Calibrating geologic strata, dinosaurs, and other fossils at Dinosaur Provincial Park (Alberta, Canada) using a new CA-ID-TIMS U-Pb geochronology. Canadian Journal of Earth Sciences. doi:10.1139/cjes-2023-0037(新しいタブで開きます)
- Lambe, L. M. (1913). A new genus and species of Ceratopsia from the Belly River Formation of Alberta. The Ottawa Naturalist 27(9): 109-116.
- Ryan, M. J., Holmes, R. & Russell, A. P. (2007). A revision of the late Campanian centrosaurine ceratopsid genus Styracosaurus from the Western Interior of North America. Journal of Vertebrate Paleontology 27: 944-962. doi:10.1671/0272-4634(2007)27[944:AROTLC]2.0.CO;2(新しいタブで開きます)