恐龍卡第 1508 張，共 2 027 張

Pycnonemosaurus

名字的意思： “dense forest lizard”1

吃：肉肉食恐龍白堊紀晚期

Pycnonemosaurus was a big meat-eating dinosaur with sharp teeth and strong legs. It lived in what is now Brazil, about 72 million years ago. It was one of the largest abelisaurids, a group of short-snouted predators.1

生存年代

100 到 66 百萬年前4

白堊紀晚期

化石發現地

Fazenda Roncador (now Jangada Roncador), Mato Grosso, Brazil1 4

長度

6 到 9 m (20 到 30 ft)1

體重

1.2 公噸到 3.6 公噸 (2,600 到 7,900 lb)1

高度

2.7 m (8.9 ft)

估計值

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

牠有多大？

牠有多長？

牠有多高？

估計值

牠有多重？

跟 2.5 台汽車一樣重

跟 2 台汽車排成一排一樣長跟 50 根香蕉頭尾相接一樣長跟 180 隻狗一樣重跟 720 顆西瓜一樣重跟 4 整班小學生一樣重跟 8 隻北極熊一樣重能在 12 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Pycnonemosaurus 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)

Pycnonemosaurus 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

Pycnonemosaurus is the largest formally described abelisaurid, with later estimates reaching about 8.9 metres (29.2 ft) long.1

Its bones were found in red conglomeratic sandstone, and the surface was abraded, meaning the bones were partly exposed before being collected.1

The only known skeleton is incomplete, including five teeth, parts of seven tail vertebrae, a right pubis, a right tibia, and part of a right fibula.1 2

It had a small pubic foot and a hatchet-shaped cnemial crest on its tibia, which are unique features among abelisaurs.1 2

The specimen is thought to be from an immature individual, probably a subadult, so adults might have been even larger.1

Its tail vertebrae have fan-shaped transverse processes and forward projections, typical of abelisaurids, but these projections become smaller towards the end of the tail.1

Pycnonemosaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Pycnonemosaurus 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 Pycnonemosaurus 最常被問的問題

?How big was Pycnonemosaurus?

It was about 8.9 metres long and weighed around 3.6 tonnes. That makes it the largest formally described abelisaurid.1

?What did Pycnonemosaurus eat?

It was a predator that probably ate titanosaurs, which were huge long-necked dinosaurs found in the same area. Its small, sharp teeth helped it grip struggling prey.1

?Where was Pycnonemosaurus found?

Its bones were found in Brazil, in the state of Mato Grosso, in red conglomeratic sandstone of the Cachoeira do Bom Jardim Formation.1

?When did Pycnonemosaurus live?

It lived during the Late Cretaceous, about 72 million years ago, in the late Campanian to early Maastrichtian stages.1

?Was Pycnonemosaurus a dinosaur?

Yes, it was a carnivorous theropod dinosaur, part of the group Abelisauridae.1

?Is Pycnonemosaurus bigger than Carnotaurus?

Yes, Pycnonemosaurus was larger. It reached about 8.9 metres long, while Carnotaurus was about 7.8 metres long.3

迷思破解王

迷思： Pycnonemosaurus was a small dinosaur.

真相： It was actually one of the largest abelisaurids, with length estimates up to 9 metres (29.5 ft) and weight up to 3.6 tonnes (4.0 short tons).1

給恐龍專家

學名: Pycnonemosaurus
命名者: Kellner and Campos 20024
類群: 肉食恐龍
科 / 演化支: Abelisauridae4
分類: Theropoda > Ceratosauria > Abelisauridae4
岩石的年代: 100 到 66 百萬年 (Cenomanian / Maastrichtian)4
國家: 巴西4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: The fossils were collected in 1952 to 1953 by Llewellyn Ivor Price at a farm called Roncador in Mato Grosso, Brazil. The species was named by Kellner and Campos in 2002.1 4
仍有爭議: Scientists are not sure about its exact size because the only skeleton is incomplete and from a young individual, so estimates range from 6 to 9 metres long.1