Protognathosaurus

Leina le raya: “early jaw lizard”1

E jele: DimelaMelala-meleeleBogare jwa Jurassic go ya go Bofelo jwa Jurassic

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

E tshetse

dimilione tsa dingwaga di le 171 go ya go 155 tse di fetileng3

Bogare jwa Jurassic go ya go Bofelo jwa Jurassic

Difosili di fitlhetswe kwa

Dashanpu Dinosaur Quarry, Sichuan, China3 1

Boleele

10 go ya go 100 m (33 go ya go 328 ft)2

Bonako jo bogolo

e ka nna 15 km/h (9 mph)

Go taboga, kakanyo

E tshetse leng?

Triassic

Jurassic

Cretaceous

dimilione tsa dingwaga di le 252 tse di fetileng20114566, asteroiti

E ne e le kgolo go le kae?

E ne e le telele go le kae?

telele jaaka dikoloi di le 22 di emisitswe mo molengtelele jaaka dibanana di le 560 di latelanae ne e ka taboga dimetara di le 100 mo metsotswaneng e le 24 (motho yo o bonako go gaisa o tlhoka 9,6)

Protognathosaurus e ne e le kgolo go le kae fa e bapisiwa le WENA?

Ke dipalo fela mo sebatling sa gago. Ga go sepe se se bolokwang kgotsa se se romelwang gope.

E ne e le bonako go le kae?

Motho yo o tsamayang e ka nna 5 km/h (3 mph)

Ngwana mo baesekeleng e ka nna 12 km/h (7 mph)

Protognathosaurus e ka nna 15 km/h (9 mph)

Pitse e e sianang ka bonako e ka nna 65 km/h (40 mph)

Lengau e ka nna 100 km/h (62 mph)

dilo tse di monate

Dintlha tse di monate

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

Setshwantsho sa Protognathosaurus se se dirilweng ke AI — Setshwantsho se se dirilweng ke AI sa kafa Protognathosaurus e ka tswang e ne e lebega ka gone, se dirilwe ke khomputara go ya ka se borasaense ba se itseng. Ke kakanyo fela: phologolo ya nnete e ka tswa e ne e lebega ka tsela e sele, mme ga go ope yo o itseng mebala ya yona ya nnete.

o botsitse

Dipotso tse di botswang thata ka ga 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

Ya baitseanape ba didino

Leina la saense: Protognathosaurus
Leina le neilwe ke: Olshevsky 19913
Setlhopha: Melala-meleele
Lelapa / clade: Cetiosauridae3
Thulaganyo: Sauropodomorpha > Sauropoda3
Bogolo jwa matlapa: 171 go ya go 155 dimilione tsa dingwaga (Bajocian / Oxfordian)3
Dibopego tsa matlapa: Shaximiao3
Dinaga: Tšhaena3
Direkoto tsa difosili: 1 mo The Paleobiology Database3
Go fitlhelwa: 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
Go sa ntse go ganetsanwa: 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

Kwa dintlha di tswang teng

Protognathosaurus (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Protognathosaurus in The Paleobiology Database (CC BY 4.0): dingwaga, mafelo, dibopego tsa matlapa, thulaganyo.

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