Protognathosaurus

Hiika maqaa: “early jaw lizard”1

Kan nyaate: BiqiltootaMorma-dheertotaJuraasikii Gidduu hanga Juraasikii Dhumaa

Protognathosaurus was a long-necked, plant-eating dinosaur that lived in what is now China during the Middle Jurassic. It is known only from a piece of its lower jaw, so scientists are still learning about it. Most researchers think it was a medium-sized sauropod.1 3

Kan jiraate

waggaa miliyoona 171 hanga 155 dura3

Juraasikii Gidduu hanga Juraasikii Dhumaa

Fosiliiwwan kan itti argaman

Dashanpu Dinosaur Quarry, Sichuan, China3 1

Dheerina

10 hanga 100 m (33 hanga 328 ft)2

Saffisa ol'aanaa

gara 15 km/sa'a (9 mph)

Fiiguu, tilmaama

Yoom jiraate?

Tiraayaasikii

Juraasikii

Kireetaashasii

waggaa miliyoona 252 dura20114566, asteerooyidii

Hammam guddaa ture?

Hammam dheeraa ture?

akka konkolaataa 22 tarreen dhaabatan dheeraaakka muuzii 560 walitti hiriiran dheeraameetira 100 sekondii 24 keessatti fiiguu danda'a (namni hunda caalaa saffisaan 9.6 barbaada)

SI wajjin yoo wal bira qabamu, Protognathosaurus 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)

Protognathosaurus gara 15 km/sa'a (9 mph)

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

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

wantoota bareedoo

Odeeffannoowwan bashannansiisoo

Protognathosaurus is known only from a single fossil: the front part of a left lower jaw, called a dentary.1

This dinosaur had 18 to 20 teeth in its lower jaw, and some of them were sharp replacement teeth still growing in.1 2

Its teeth had a sharp point and small serrations (like a steak knife) on the front and back edges.2

The name Protognathosaurus was first used in 1991 by George Olshevsky, because the original name Protognathus was already taken by a beetle.1

Most scientists consider Protognathosaurus a nomen dubium, meaning the fossil is too incomplete to be sure it is a distinct species.1

The jaw bone is thick and heavy, with a deep groove called the Meckelian canal, which is a feature of some early sauropods.2

Fakkii AI'n hojjetame: Protognathosaurus — Fakkii AI'n hojjetame kan Protognathosaurus 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 Protognathosaurus baay'ee gaafataman

?How big was Protognathosaurus?

Scientists don't know exactly, because only a jaw bone has been found. It was probably a medium-sized sauropod, maybe 10 to 20 metres long.1 3

?What did Protognathosaurus eat?

It was a herbivore, meaning it ate plants. Its sharp, serrated teeth helped it chew tough leaves.1 3

Ogeeyyii daayinootiif

Maqaa saayinsii: Protognathosaurus
Kan maqaa baase: Olshevsky 19913
Garee: Morma-dheertota
Maatii / kilaadii: Cetiosauridae3
Ramaddii: Sauropodomorpha > Sauropoda3
Umurii dhagaawwanii: waggaa miliyoona 171 hanga 155 (Bajocian / Oxfordian)3
Caasaawwan dhagaa: Shaximiao3
Biyyoota: Chaayinaa3
Galmee fosilii: 1 The Paleobiology Database keessa3
Argannoo: The fossil was found in the Dashanpu Dinosaur Quarry in Sichuan, China. It was named Protognathus oxyodon by Zhang Yihun in 1988, but that name was already used for a beetle, so George Olshevsky renamed it Protognathosaurus oxyodon in 1991.1
Ammallee falmisiisaa: Scientists are not sure if Protognathosaurus is a valid dinosaur or just a doubtful name, because only a piece of jaw has been found.1

Odeeffannoon eessaa dhufa

Protognathosaurus (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Protognathosaurus in The Paleobiology Database (CC BY 4.0): umurii, bakkeewwan, caasaawwan dhagaa, ramaddii.

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