恐龍卡第 0078 張，共 2 027 張

Alnashetri

名字的意思： “slender thighs”1

吃：肉奇特的羽毛恐龍白堊紀早期

Alnashetri was a tiny, feathered dinosaur that sprinted through the forests of ancient Argentina. It belonged to a group called alvarezsauroids, known for their long legs and bird-like feet. Scientists think it used its speed to chase after small prey.1

生存年代

113 到 110 百萬年前4

白堊紀早期

化石發現地

La Buitrera, Río Negro Province, Argentina1

最高速度

時速約 30 公里（19 英里）

跑步, 估計值

牠生活在什麼時候？

三疊紀

侏羅紀

白堊紀

2 億 5200 萬年前20114566，小行星撞地球

牠有多快？

走路的人 時速約 5 公里 (3 mph)

騎腳踏車的小朋友 時速約 12 公里 (7 mph)

Alnashetri 時速約 30 公里 (19 mph)

一匹飛奔的馬 時速約 65 公里 (40 mph)

一隻獵豹 時速約 100 公里 (62 mph)

酷東西

趣味知識

Alnashetri had a low ridge on its shin bone that separated the ankle joint from the outer part of the bone, a unique feature not seen in other coelurosaurs.1

The only known fossils are the hind legs of one individual, found in 2005 at a site called Hoyada de los Esfenodontes.1

Its name comes from the Tehuelche language and means 'slender thighs,' because its legs were long and slim.1

Alnashetri lived alongside the dromaeosaurid Buitreraptor, but the two dinosaurs are easy to tell apart by differences in their foot bones.1

The rocks where Alnashetri was found also contain fossils of ancient snakes, rhynchosaurs, and mammals, showing that La Buitrera was a rich ecosystem.1

Alnashetri 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Alnashetri 可能的樣子。這只是猜測：真正的動物可能長得不一樣，也沒有人知道牠真正的顏色。

你們都在問

關於 Alnashetri 最常被問的問題

?How big was Alnashetri?

Alnashetri was about the size of a crow, making it one of the smallest known dinosaurs.3

?What did Alnashetri eat?

It probably hunted small animals like lizards, snakes, mammals and invertebrates.3

?When did Alnashetri live?

Alnashetri lived during the Early Cretaceous, about 111 to 106 million years ago.1

?Where was Alnashetri found?

Its fossils were discovered in La Buitrera, Río Negro Province, Argentina, in the Candeleros Formation.1

給恐龍專家

學名: Alnashetri
命名者: Makovicky et al. 20124
類群: 奇特的羽毛恐龍
科 / 演化支: Alvarezsauridae4
分類: Theropoda > Alvarezsauridae4
岩石的年代: 113 到 110 百萬年 (Albian)4
岩層: Candeleros4
國家: 阿根廷4
化石紀錄: The Paleobiology Database 收錄 2 筆4
發現: Alnashetri was first described by paleontologists Peter Makovicky, Sebastián Apesteguía, and Federico Gianechini in 2012. The name honors the nearby village of Cerro Policía, whose residents helped with fieldwork.1
仍有爭議: Scientists are not sure exactly where Alnashetri fits on the dinosaur family tree. Its ankle bones suggest it was an alvarezsauroid, but this evidence comes from only one part of the body and might be misleading.1 2