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Protognathus kartun
Dino kad No. 1487 wɔ 2 027 mu

Protognathus

Din no ase: “early jaw lizard”1
Ɔdii: NhabanKɔn tentenJurasik Mfinimfini kɔsi Jurasik Awieeɛ

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

Ɔtenaa ase
mfeɛ ɔpepem 171 kɔsi 155 a atwam3
Jurasik Mfinimfini kɔsi Jurasik Awieeɛ
Ntɛmntɛm a ɛsen biara
bɛyɛ 15 km/h (9 mph)
Mmirikatuo, nsusuiɛ

Berɛ bɛn na ɛtenaa ase?

Triasik
Jurasik
Kretasias
mfeɛ ɔpepem 252 a atwam20114566, ɔsoro ɛboɔ no

Na ɛyɛ ntɛm sɛn?

nneɛma a ɛyɛ fɛ

Nsɛm a ɛyɛ anigye

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

AI na ɛyɛeɛProtognathus mfonini a AI yɛeɛ
Yei yɛ Protognathus mfonini a AI yɛeɛ, sɛdeɛ ebia na ɔteɛ. Kɔmputa na ɛyɛeɛ firi deɛ nyansahufoɔ nim mu. Ɛyɛ nsusuiɛ: ebia na aboa ankasa no nte saa, na obiara nnim ne kɔla ankasa.

Atosɛm sɛefoɔ

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

Nokorɛ: 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

Ma dino ho animdefoɔ

Nyansahu din
Protognathus
Obi a ɔtoo din
Zhang 19883
Kuo
Kɔn tenten
Abusua / kuo kɛseɛ
Cetiosauridae3
Nkyekyɛmu
Sauropodomorpha > Sauropoda3
Abotan no mfeɛ
mfeɛ ɔpepem 171 kɔsi 155 (Bajocian / Oxfordian)3
Fɔsil nkyerɛwee
1 wɔ The Paleobiology Database mu3
Nhunumu
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
Wɔda so gye ho akyinnye
Scientists debate whether Protognathosaurus is a valid genus or just a nomen dubium, because the only fossil is a piece of jaw.1

Baabi a nsɛm no firi

  1. Protognathosaurus (en.wikipedia.org)
  2. PBDB Taxon (paleobiodb.org)
  3. Protognathus in The Paleobiology Database (CC BY 4.0): mfeɛ, mmeaeɛ, abotan nhyehyɛeɛ, nkyekyɛmu.

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