恐龍卡第 1035 張，共 2 027 張

Leptorhynchos

名字的意思： “slender beak”1

吃：每樣都來一點奇特的羽毛恐龍白堊紀晚期

Leptorhynchos was a small, bird-like dinosaur that lived in what is now Texas, USA. It had a slender, slightly upturned beak and probably ate a mix of plants and small animals.1 3

生存年代

84 到 66 百萬年前3

白堊紀晚期

化石發現地

Texas, USA, and possibly Alberta and Saskatchewan, Canada1 3

長度

1.75 m (5.7 ft)1

體重

19 kg (42 lb)1

高度

0.72 m (2.4 ft)

估計值

最高速度

時速約 41 公里（25 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

牠有多大？

牠有多長？

牠有多高？

估計值

牠有多重？

跟 5 隻家貓一樣重

跟 4 隻家貓從鼻子接到尾巴一樣長跟 10 根香蕉頭尾相接一樣長跟 160 根香蕉一樣重能在 8.8 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Leptorhynchos 跟「你」比起來有多大？

只是在你的瀏覽器裡算算數學。什麼都不會被儲存或傳送出去。

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)

Leptorhynchos 時速約 41 公里 (25 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

Leptorhynchos lived about 80 to 72 million years ago, during the Campanian stage of the Late Cretaceous.1

Its name means 'slender beak' in Greek, because its beak was narrow and pointed.1

Leptorhynchos was a caenagnathid, a group of theropod dinosaurs that are closely related to oviraptorosaurs.1 2

Only one species is widely accepted: Leptorhynchos gaddisi, named after the Gaddis family who owned the land where the first fossil was found.1

Leptorhynchos was small for a dinosaur, only about 1.75 metres (5.7 feet) long and weighing around 19 kilograms (42 pounds).1

Its fossils were found in the Aguja Formation in Texas, which was once a coastal marsh and floodplain.1

Leptorhynchos shared its home with many other dinosaurs, including horned dinosaurs like Agujaceratops and duck-billed dinosaurs.1

Leptorhynchos 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Leptorhynchos 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。

給恐龍專家

學名: Leptorhynchos
命名者: Longrich et al. 20133
類群: 奇特的羽毛恐龍
科 / 演化支: Caenagnathidae3
分類: Theropoda > Oviraptorosauria3
岩石的年代: 84 到 66 百萬年 (Campanian / Maastrichtian)3
岩層: Dinosaur Park, Aguja, Frenchman3
國家: 加拿大, 美國3
化石紀錄: The Paleobiology Database 收錄 10 筆3
發現: Leptorhynchos was named in 2013 by Nick Longrich, Ken Barnes, Scott Clark, and Larry Millar based on fossils from the Aguja Formation in Texas.1 3
仍有爭議: Scientists are not sure whether some fossils from Canada and other US states really belong to Leptorhynchos or to other caenagnathids.1