Protognathus

Lebitso le bolela: “early jaw lizard”1

E jele: DimelaMelala e meleleleJurasiki ya Bohareng ho isa ho Jurasiki ya Morao

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

E phetse

dilemo tse dimilione tse 171 ho isa ho 155 tse fetileng3

Jurasiki ya Bohareng ho isa ho Jurasiki ya Morao

Lebelo le phahameng ka ho fetisisa

e ka bang 15 km/h (9 mph)

Ho matha, kakanyo

E phetse neng?

Triasiki

Jurasiki

Kretase

Dilemo tse dimilione tse 252 tse fetileng20114566, asteroiti

E ne e le lebelo hakae?

Motho ya tsamayang ka maoto e ka bang 5 km/h (3 mph)

Ngwana a palame baesekele e ka bang 12 km/h (7 mph)

Protognathus e ka bang 15 km/h (9 mph)

Pere e mathang ka matla e ka bang 65 km/h (40 mph)

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

dintho tse monate

Dintlha tse monate

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

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

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

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

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

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

Setshwantsho sa Protognathus se entsweng ke AI — Setshwantsho se entsweng ke AI, se bontshang kamoo Protognathus e ka beng e ne e shebahala kateng, se entswe ke khomphutha ho ya ka seo bo-ramahlale ba se tsebang. Ke ho hakanya feela: phoofolo ya nnete e ka nna ya ba e ne e shebahala ka tsela e nngwe, mme ha ho motho ya tsebang mebala ya yona ya nnete.

Mosenyi wa ditshomo

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

Nnete: 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

Bakeng sa ditsebi tsa didinosaure

Lebitso la saense: Protognathus
E rehilwe ke: Zhang 19883
Sehlopha: Melala e melelele
Lelapa / leloko: Cetiosauridae3
Tlhophiso: Sauropodomorpha > Sauropoda3
Dilemo tsa mafika: dilemo tse dimilione tse 171 ho isa ho 155 (Bajocian / Oxfordian)3
Direkoto tsa difosili: 1 ho The Paleobiology Database3
Ho sibollwa: 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
E sa ntse e phehwa kgang: Scientists debate whether Protognathosaurus is a valid genus or just a nomen dubium, because the only fossil is a piece of jaw.1

Moo dintlha di tswang teng

Protognathosaurus (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Protognathus in The Paleobiology Database (CC BY 4.0): dilemo, dibaka, dibopeho tsa mafika, tlhophiso.

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