Protognathosaurus

Igama lithetha: “early jaw lizard”1

Yayitya: IzityaloIintamo-ndeiJurassic ephakathi ukuya ku-iJurassic yamva

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

Yaphila

171 ukuya ku-155 izigidi zeminyaka eyadlulayo3

iJurassic ephakathi ukuya ku-iJurassic yamva

Iifosili zifunyenwe:

Dashanpu Dinosaur Quarry, Sichuan, China3 1

Ubude

10 ukuya ku-100 m (33 ukuya ku-328 ft)2

Esona santya siphezulu

malunga ne-15 km/h (9 mph)

Ukubaleka, uqikelelo

Yaphila nini?

iTriassic

iJurassic

iCretaceous

Izigidi ezingama-252 zeminyaka eyadlulayo20114566, i-asteroyidi

Yayinkulu kangakanani?

Yayinde kangakanani?

inde njengeemoto ezingama-22 zipakwe zilandelelanainde njengeebhanana ezingama-560 zilandelelanaibinokubaleka iimitha ezili-100 ngemizuzwana engama-24 (oyena mntu ukhawulezayo udinga i-9,6)

Protognathosaurus wayemkhulu kangakanani xa ethelekiswa NAWE?

Yimathematika nje kwibhrawuza yakho. Akukho nto igcinwayo okanye ithunyelwe naphi na.

Yayikhawuleza kangakanani?

Umntu ohambayo malunga ne-5 km/h (3 mph)

Umntwana ekhwele ibhayisikile malunga ne-12 km/h (7 mph)

Protognathosaurus malunga ne-15 km/h (9 mph)

Ihashe elibaleka ngamandla malunga ne-65 km/h (40 mph)

Ingwenkala malunga ne-100 km/h (62 mph)

izinto ezimnandi

Iinyani ezimnandi

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

Umfanekiso owenziwe yi-AI: Protognathosaurus — Umfanekiso owenziwe yi-AI obonisa indlela Protognathosaurus esenokuba wayekhangeleka ngayo, wenziwe yikhompyutha ngokwento eyaziwa zizazinzulu. Kukuqikelela nje: esona silwanyana sinokuba sasikhangeleka ngenye indlela, kwaye akukho mntu waziyo imibala yaso yokwenyani.

ubuzile

Eyona mibuzo ibuzwa kakhulu: 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

Kwiingcali zeedayinaso

Igama lenzululwazi: Protognathosaurus
Inikwe igama ngu:: Olshevsky 19913
Iqela: Iintamo-nde
Usapho / iclade: Cetiosauridae3
Ukuhlelwa: Sauropodomorpha > Sauropoda3
Ubudala bamatye: 171 ukuya ku-155 izigidi zeminyaka (Bajocian / Oxfordian)3
Izakhiwo zamatye: Shaximiao3
Amazwe: iTshayina3
Iirekhodi zeefosili: 1 kwi-Paleobiology Database3
Ukufunyanwa: 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
Kusaxoxwa ngayo: 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

Apho iinyani zivela khona

Protognathosaurus (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Protognathosaurus in The Paleobiology Database (CC BY 4.0): ubudala, iindawo, izakhiwo zamatye, ukuhlelwa.

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