Protognathosaurus

Il num vul dir: “early jaw lizard”1

Mangiava: PlantasCuliezs lungsGiurassic mesaun fin Giurassic tardiv

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

Viveva

avant 171 fin 155 milliuns onns3

Giurassic mesaun fin Giurassic tardiv

Fossils chattads en

Dashanpu Dinosaur Quarry, Sichuan, China3 1

Lunghezza

10 fin 100 m (33 fin 328 ft)2

Spertadad maximala

var 15 km/h (9 mph)

Currer, stima

Cura viveva el?

Triassic

Giurassic

Cretacic

avant 252 milliuns onns20114566, l'asteroid

Quant grond era el?

Quant lung era el?

uschè lung sco 22 autos parcads in suenter l'auteruschè lung sco 560 bananas ina suenter l'autrapudess currer 100 meters en 24 secundas (il pli spert uman dovra 9,6)

Quant grond era Protognathosaurus cumpareglià cun TAI?

Mo matematica en tes navigatur. Nagut na vegn arcunà u tramess.

Quant spert era el?

Ina persuna che va a pe var 5 km/h (3 mph)

In uffant sin il velo var 12 km/h (7 mph)

Protognathosaurus var 15 km/h (9 mph)

In chaval che galoppescha var 65 km/h (40 mph)

In gepard var 100 km/h (62 mph)

chaussas cool

Fatgs divertents

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

Maletg da Protognathosaurus fatg cun IA — In maletg fatg cun IA che mussa co Protognathosaurus pudess avair guardà ora, fatg d'in computer tenor quai che la scienza sa. I sa tracta d'ina supposiziun: l'animal vair ha forsa guardà ora auter, e sias colurs vairas èn nunenconuschentas.

tias dumondas

Las dumondas las pli frequentas davart 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

Per experts da dinos

Num scientific: Protognathosaurus
Numnà da: Olshevsky 19913
Gruppa: Culiezs lungs
Famiglia / clada: Cetiosauridae3
Classificaziun: Sauropodomorpha > Sauropoda3
Vegliadetgna da la crappa: 171 fin 155 milliuns onns (Bajocian / Oxfordian)3
Formaziuns da crap: Shaximiao3
Pajais: China3
Chats da fossils: 1 en The Paleobiology Database3
Scuverta: 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
Anc discutà: 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

Danunder che vegnan ils fatgs

Protognathosaurus (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Protognathosaurus in The Paleobiology Database (CC BY 4.0): vegliadetgna, lieus, formaziuns da crap, classificaziun.

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