Protognathosaurus

Izina risobanura: “early jaw lizard”1

Yaryaga: IbimeraIzifite amajosi maremareJurasike yo hagati kugeza Jurasike ya nyuma

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

Yabayeho

hashize imyaka miliyoni 171 kugeza 1553

Jurasike yo hagati kugeza Jurasike ya nyuma

Ibisigazwa byabonetse muri

Dashanpu Dinosaur Quarry, Sichuan, China3 1

Uburebure

10 kugeza 100 m (33 kugeza 328 ft)2

Umuvuduko wo hejuru

nka 15 km/h (9 mph)

Kwiruka, igereranya

Yabayeho ryari?

Triyasike

Jurasike

Kiretase

Hashize miliyoni 252 z'imyaka20114566, asiteroyide

Yanganaga ite?

Yari ndende ite?

ndende nk'imodoka 22 ziparitse ku murongondende nk'imineke 560 ikurikiranyeyashoboraga kwiruka metero 100 mu masegonda 24 (umuntu wihuta kurusha abandi akenera 9,6)

Protognathosaurus yanganaga ite ugereranyije NAWE?

Ni imibare gusa ibarirwa muri mushakisha yawe. Nta kintu kibikwa cyangwa cyoherezwa ahandi.

Yihutaga ite?

Umuntu ugenda n'amaguru nka 5 km/h (3 mph)

Umwana ku igare nka 12 km/h (7 mph)

Protognathosaurus nka 15 km/h (9 mph)

Ifarashi yiruka cyane nka 65 km/h (40 mph)

Ingwe yihuta cyane nka 100 km/h (62 mph)

utuntu twiza cyane

Utuntu dushimishije

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

Ishusho ya Protognathosaurus yakozwe na AI — Ishusho yakozwe na AI yerekana uko Protognathosaurus ishobora kuba yari isa, yakozwe na mudasobwa hashingiwe ku byo abahanga bazi. Ni ugukeka gusa: inyamaswa nyayo ishobora kuba yari isa ukundi, kandi nta muntu uzi amabara yayo nyayo.

wabajije

Ibibazo bibazwa cyane kuri 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

Ku bazobereye muri dinozore

Izina rya siyansi: Protognathosaurus
Yiswe na: Olshevsky 19913
Itsinda: Izifite amajosi maremare
Umuryango / ishami: Cetiosauridae3
Ishyirwa mu byiciro: Sauropodomorpha > Sauropoda3
Imyaka y'amabuye: imyaka miliyoni 171 kugeza 155 (Bajocian / Oxfordian)3
Inzego z'amabuye: Shaximiao3
Ibihugu: Ubushinwa3
Ibisigazwa byanditswe: 1 muri The Paleobiology Database3
Ivumburwa: 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
Biracyagibwaho impaka: 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

Aho amakuru yakuwe

Protognathosaurus (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Protognathosaurus in The Paleobiology Database (CC BY 4.0): imyaka, ahantu, inzego z'amabuye, ishyirwa mu byiciro.

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