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Protognathus na ndenge ya karton
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Protognathus

Nkombo elingi koloba: “early jaw lizard”1
Alyaki: MilonaNkingo milaiJurasiki ya katikati kino Jurasiki ya nsuka

Protognathosaurus was a big, long-necked plant eater that lived in China during the Middle Jurassic. It is known from just a piece of its lower jaw, so scientists are still figuring out exactly what it looked like.1

Azalaki na bomoi
mbula milio 171 kino 155 eleki3
Jurasiki ya katikati kino Jurasiki ya nsuka
Mbangu ya likolo
pene na 15 km/h (9 mph)
Kopota mbangu, kokanisa

Azalaki na bomoi ntango nini?

Triasiki
Jurasiki
Kretase
Mbula milio 252 eleki20114566, asteroide

Azalaki na mbangu boni?

makambo ya kitoko

Makambo ya kosepelisa

1

Protognathosaurus is known only from a single piece of lower jaw, called a dentary, which had about 18 tooth positions.1

2

Its name was first Protognathus, but that name was already used for a beetle, so in 1991 it was changed to Protognathosaurus.1

3

The jaw shows sharp replacement teeth still growing in, which is why the species name oxyodon means 'sharp tooth'.1

4

It lived about 168 to 161 million years ago, during the Middle Jurassic.1

5

The fossil was found in the Lower Shaximiao Formation, which is made of sandstone and mudstone from an ancient lake.2

6

Scientists think it was a medium-sized primitive sauropod, with a thick and heavy lower jaw.2

Esalemi na AIElilingi ya Protognathus esalemi na AI
Elilingi esalemi na AI oyo ezali kolakisa ndenge Protognathus akokaki kozala. Ordinatere esalaki yango na makambo oyo bato ya siansi bayebi. Ezali kaka kokanisa: nyama ya solo akokaki kozala ndenge mosusu, mpe moto moko te ayebi balangi na ye ya solo.

Mobuki masapo

Lisapo: Some people think Protognathosaurus is a fake or made-up dinosaur because it is so incomplete.

Solo: It is a real dinosaur, but many scientists consider it a nomen dubium, meaning the name is doubtful because the fossil is too fragmentary to be sure.1

Mpo na bayebi ya badino

Nkombo ya siansi
Protognathus
Nkombo epesamaki na
Zhang 19883
Lisanga
Nkingo milai
Libota / klade
Cetiosauridae3
Klasifikasio
Sauropodomorpha > Sauropoda3
Mbula ya mabanga
mbula milio 171 kino 155 (Bajocian / Oxfordian)3
Bafosile oyo ekomami
1 na The Paleobiology Database3
Ntango bamonaki yango
In 1988, Zhang Yihun named and described the type species Protognathus oxyodon from a jaw found in China. In 1991, George Olshevsky renamed it Protognathosaurus because the old name was already taken.1
Naino bazali kowelana
Scientists debate whether Protognathosaurus is a valid genus or just a nomen dubium, because the only fossil is a piece of jaw.1

Esika makambo euti

  1. Protognathosaurus (en.wikipedia.org)
  2. PBDB Taxon (paleobiodb.org)
  3. Protognathus in The Paleobiology Database (CC BY 4.0): mbula, bisika, milongo ya mabanga, klasifikasio.

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