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Limusaurus

Kan nyaate: BiqiltootaDaayinoowwan foon nyaatanJuraasikii Dhumaa

Limusaurus was a small, beaked dinosaur that lived in what is now China about 155 million years ago. Unlike most meat-eating dinosaurs, it ate plants! Its strange hand helped scientists solve a puzzle about how bird wings evolved.1

Kan jiraate

waggaa miliyoona 162 hanga 155 dura7

Juraasikii Dhumaa

Fosiliiwwan kan itti argaman

Xinjiang, China, in the Shishugou Formation2 1

Dheerina

1.7 hanga 1.955 m (5.6 hanga 6.4 ft)3 4

Ulfaatina

15 kg (33 lb)3

Ol-dheerina

0.67 m (2.2 ft)

tilmaama

Saffisa ol'aanaa

gara 41 km/sa'a (25 mph)

Fiiguu, tilmaama

Yoom jiraate?

Tiraayaasikii

Juraasikii

Kireetaashasii

waggaa miliyoona 252 dura20114566, asteerooyidii

Hammam guddaa ture?

Hammam dheeraa ture?

Hammam ol-dheeraa ture?

tilmaama

Hammam ulfaataa ture?

akka adurree manaa 4 ulfaata

akka adurree manaa 4 funyaan hanga eegeetti dheeraaakka muuzii 11 walitti hiriiran dheeraaakka muuzii 120 ulfaatameetira 100 sekondii 8.8 keessatti fiiguu danda'a (namni hunda caalaa saffisaan 9.6 barbaada)

SI wajjin yoo wal bira qabamu, Limusaurus hammam guddaa ture?

Herrega qofa barbaadduu kee keessatti. Wanti tokkollee hin olkaa'amu, eessayyuu hin ergamu.

Hammam saffisaa ture?

Nama miilaan deemu gara 5 km/sa'a (3 mph)

Daa'ima saayikilii irra jiru gara 12 km/sa'a (7 mph)

Limusaurus gara 41 km/sa'a (25 mph)

Farda gulufu gara 65 km/sa'a (40 mph)

Cheetaa gara 100 km/sa'a (62 mph)

wantoota bareedoo

Odeeffannoowwan bashannansiisoo

Limusaurus was a ceratosaur, the first one ever found in Asia.1

It had a very small thumb, or first digit, while the other two fingers were normal. This is a rare condition in dinosaurs.1

Its hand showed a mix of features: the wrist bones were like the second, third and fourth digits, but the finger bones were like the first, second and third.1

Limusaurus lived during the Oxfordian stage, about 161 to 155 million years ago.2

It is the only Jurassic theropod known to have a beak and a plant-based diet.1

The discovery of Limusaurus helped scientists understand how the three-fingered hand of theropods could turn into the two-fingered hand of birds.1

Fakkii AI'n hojjetame: Limusaurus — Fakkii AI'n hojjetame kan Limusaurus maal fakkaachuu akka danda'u agarsiisu, kompiitaraan beekumsa saayintistootaa irratti hundaa'uun hojjetame. Tilmaama qofa: bineensi dhugaa adda ta'ee mul'achuu danda'a, halluu isaa dhugaa immoo namni beeku hin jiru.

ati gaafatte

Gaaffiiwwan waa'ee Limusaurus baay'ee gaafataman

?What did Limusaurus eat?

It ate plants. Adults had a beak and no teeth, and they also had gastroliths (stomach stones) to help grind up plant food. Juveniles had teeth, so they may have eaten a mix of plants and small animals.5

?How big was Limusaurus?

About 1.7 metres long and weighed around 15 kilograms. That is about as long as a small car is tall, but much lighter.5

?Did Limusaurus have feathers?

Nobody knows for sure. It may have had feathers, but no direct evidence of feathers has been found on its fossils.5

?Why is Limusaurus important?

Its strange hand helped scientists solve a puzzle about how bird wings evolved. It showed a mix of wrist and finger features that explain how the three-fingered hand of theropods turned into the bird wing.1 6

?Is Limusaurus a dinosaur?

Yes, it is a dinosaur. It is a theropod dinosaur, which is the same group that includes birds.5

?When did Limusaurus live?

It lived during the Late Jurassic period, about 161 to 155 million years ago.5

Seenaa sobaa diigaa

Seenaa sobaa: Because it is a theropod, Limusaurus must have been a meat-eater.

Dhugaa: Limusaurus was actually a plant-eater, with a beak and no sharp teeth for hunting. It is one of the few herbivorous theropods known.1

Ogeeyyii daayinootiif

Maqaa saayinsii: Limusaurus
Kan maqaa baase: Xu et al. 20097
Garee: Daayinoowwan foon nyaatan
Maatii / kilaadii: Noasauridae7
Ramaddii: Theropoda > Ceratosauria7
Umurii dhagaawwanii: waggaa miliyoona 162 hanga 155 (Oxfordian)7
Caasaawwan dhagaa: Shishugou7
Biyyoota: Chaayinaa7
Galmee fosilii: 3 The Paleobiology Database keessa7
Argannoo: Limusaurus was named and described in 2009 by a team led by paleontologist Xing Xu. Fossils were found in the Junggar Basin of western China.1 2
Ammallee falmisiisaa: Scientists still debate exactly which digits of the hand were lost during theropod evolution, and Limusaurus shows a confusing mix of features that makes this question tricky.1

Odeeffannoon eessaa dhufa

A Jurassic ceratosaur from China helps clarify avian digital homologies | Nature (nature.com)
PBDB Taxon (paleobiodb.org)
Limusaurus (en.wikipedia.org)
A Jurassic ceratosaurian theropod with implications for homologies in the avian hand (ivpp.cas.cn)
Limusaurus (Wikipedia) (Wikipedia)
Beaked, Bird-like Dinosaur Tells Story of Finger Evolution | NSF - National Science Foundation (nsf.gov)
Limusaurus in The Paleobiology Database (CC BY 4.0): umurii, bakkeewwan, caasaawwan dhagaa, ramaddii.

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