Protognathosaurus

Erinnya litegeeza: “early jaw lizard”1

Yalyanga: EbimeraEz'ensingo empanvuAmakkati ga Jurasiki okutuuka ku Enkomerero ya Jurasiki

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

Yabeerawo

emyaka obukadde 171 okutuuka ku 155 emabega3

Amakkati ga Jurasiki okutuuka ku Enkomerero ya Jurasiki

Ebisigalira byazuulibwa mu

Dashanpu Dinosaur Quarry, Sichuan, China3 1

Obuwanvu

10 okutuuka ku 100 m (33 okutuuka ku 328 ft)2

Sipiidi esinga

nga 15 km/h (9 mph)

Okudduka, kuteebereza

Yabeerawo ddi?

Tiriyasi

Jurasiki

Kuretasi

Emyaka obukadde 252 emabega20114566, asteroyidi

Yali munene atya?

Yali muwanvu kwenkana wa?

obuwanvu ng'emmotoka 22 ezisimbiddwa mu lunyiririobuwanvu ng'amenvu 560 nga gaddiriŋŋanayandidduse mita 100 mu sikonda 24 (omuntu asinga embiro yeetaaga 9.6)

Protognathosaurus yali munene atya bw'ogeraageranya ku GGWE?

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Yali wa mbiro kwenkana wa?

Omuntu atambula nga 5 km/h (3 mph)

Omwana ku kagaali nga 12 km/h (7 mph)

Protognathosaurus nga 15 km/h (9 mph)

Embalaasi edduka ennyo nga 65 km/h (40 mph)

Cheetah nga 100 km/h (62 mph)

ebintu ebinyuvu

Ebyewuunyisa

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

Ekifaananyi kya Protognathosaurus ekyakolebwa AI, nga kiraga engeri gye yayinza okuba ng'afaanana, ekyakolebwa kompyuta okusinziira ku ebyo bannassaayansi bye bamanyi. Kuteebereza: ekisolo ekyennyini kiyinza okuba nga kyali kifaanana bulala, era tewali amanyi langi zaakyo ez'amazima.

wabuuza

Ebibuuzo ebisinga okubuuzibwa ku Protognathosaurus

?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

Eri abakugu mu dayinoso

Erinnya lya ssaayansi: Protognathosaurus
Yatuumibwa: Olshevsky 19913
Ekibinja: Ez'ensingo empanvu
Ekika / ekibinja: Cetiosauridae3
Engabanya: Sauropodomorpha > Sauropoda3
Emyaka gy'enjazi: emyaka obukadde 171 okutuuka ku 155 (Bajocian / Oxfordian)3
Ensengeka z'enjazi: Shaximiao3
Ensi: Cayina3
Ebisigalira ebyazuulibwa: 1 mu The Paleobiology Database3
Okuzuulibwa: 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
Kikyakubaganyizibwako ebirowoozo: 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

Ebituufu gye biva

Protognathosaurus (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Protognathosaurus in The Paleobiology Database (CC BY 4.0): emyaka, ebifo, ensengeka z'enjazi, engabanya.

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