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ካርቱን ናይ Protognathus
ካርድ ዳይኖሰር ቁ. 1487 ካብ 2 027

Protognathus

ትርጉም ስሙ: “early jaw lizard”1
ይበልዕ ነበረ: ኣትክልቲነዋሕቲ ክሳድማእከላይ ጁራሲክ ክሳብ ዳሕራይ ጁራሲክ

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

ዝነበረሉ
ቅድሚ 171 ክሳብ 155 ሚልዮን ዓመት3
ማእከላይ ጁራሲክ ክሳብ ዳሕራይ ጁራሲክ
ዝለዓለ ቅልጣፈ
ኣስታት 15 ኪ.ሜ/ሰ (9 ማይል/ሰ)
ጉያ, ግምት

መዓስ እዩ ዝነበረ?

ትሪያሲክ
ጁራሲክ
ክሬታሸስ
ቅድሚ 252 ሚልዮን ዓመት20114566፣ እቲ ኣስተሮይድ

ክንደይ ቅልጡፍ ነይሩ?

ዘደንቑ ነገራት

ደስ ዝብሉ ሓቅታት

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

ብAI ዝተሰርሐብAI ዝተሰርሐ ስእሊ ናይ Protognathus
ብAI ዝተሰርሐ ስእሊ፣ Protognathus ከመይ ይመስል ከም ዝነበረ ዘርኢ፣ ኮምፒተር ካብቲ ሳይንቲስታት ዝፈልጥዎ ዝሰርሖ። ግምት እዩ: እቲ ሓቀኛ እንስሳ ፍልይ ዝበለ ክመስል ይኽእል፣ ሓቀኛ ሕብሩ ድማ ዝፈልጦ የለን።

ጽውጽዋይ ዘፍርስ

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

ሓቂ: 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

ንክኢላታት ዳይኖሰር

ሳይንሳዊ ስም
Protognathus
ዝሰመዮ
Zhang 19883
ጉጅለ
ነዋሕቲ ክሳድ
ስድራ / ክላድ
Cetiosauridae3
ምድባ
Sauropodomorpha > Sauropoda3
ዕድመ እቶም ኣኻውሕ
171 ክሳብ 155 ሚልዮን ዓመት (Bajocian / Oxfordian)3
መዛግብቲ ፎሲል
1 ኣብ The Paleobiology Database3
ርኽበት
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
ገና ዘከራኽር
Scientists debate whether Protognathosaurus is a valid genus or just a nomen dubium, because the only fossil is a piece of jaw.1

ሓቅታት ካበይ ይመጹ

  1. Protognathosaurus (en.wikipedia.org)
  2. PBDB Taxon (paleobiodb.org)
  3. Protognathus in The Paleobiology Database (CC BY 4.0): ዕድመ፣ ቦታታት፣ ናይ ኣኻውሕ ንብርብራት፣ ምድባ።

ኣብዚ ገጽ ዘሎ ኩሉ ሓቂ ናብ ምንጩ ዘመልክት ቁጽሪ ኣለዎ። ጌጋ እንተ ጌርና፣ ይቕሬታ፣ ንሕና ፈተውቲ ዳይኖሰር ኢና፣ ሳይንሳዊ መጽሔት ኣይኮንናን። ኣብ [email protected] ንገረና፣ ክንእርሞ ኢና።

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ካብ ተመሳሳሊ ጉጅለ ተወሳኺ: ነዋሕቲ ክሳድ

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ካብ ተመሳሳሊ ግዜ እውን: ማእከላይ ጁራሲክ

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