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Kaadi ya dayinoso No. 2006 ku 2 027

Zavacephale

Erinnya litegeeza: “origin head”1

Yalyanga: EbimeraEz'emitwe egy'enkulungoEntandikwa ya Kuretasi

Zavacephale was a small, dome-headed dinosaur that lived in what is now Mongolia. It had a thick, rounded skull like a helmet, and it probably used it for head-butting contests. It is one of the oldest and most complete dome-headed dinosaurs ever found.1 2

Yabeerawo

emyaka obukadde 120 okutuuka ku 100 emabega5

Entandikwa ya Kuretasi

Ebisigalira byazuulibwa mu

Khuren Dukh Formation, Dundgobi Province, Mongolia1 5

Obuwanvu

1 m (3.3 ft)1

Obuzito

5.85 kg (13 lb)1

Sipiidi esinga

nga 29 km/h (18 mph)

Okudduka, kuteebereza

Yabeerawo ddi?

Tiriyasi

Jurasiki

Kuretasi

Emyaka obukadde 252 emabega20114566, asteroyidi

Yali munene atya?

Yali muwanvu kwenkana wa?

Yali muzito kwenkana wa?

obuzito ng'obwa kkapa 1.5 ab'awaka

obuwanvu nga kkapa 2 ab'awaka, ennyindo ku mukiraobuwanvu ng'amenvu 6 nga gaddiriŋŋanaobuzito ng'obwa kkapa ow'awakaobuzito ng'obw'amenvu 49yandidduse mita 100 mu sikonda 12 (omuntu asinga embiro yeetaaga 9.6)

Zavacephale yali munene atya bw'ogeraageranya ku GGWE?

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Yali wa mbiro kwenkana wa?

Omuntu atambula nga 5 km/h (3 mph)

Omwana ku kagaali nga 12 km/h (7 mph)

Zavacephale nga 29 km/h (18 mph)

Embalaasi edduka ennyo nga 65 km/h (40 mph)

Cheetah nga 100 km/h (62 mph)

ebintu ebinyuvu

Ebyewuunyisa

Zavacephale is the oldest known dome-headed dinosaur, living about 119 to 100 million years ago during the Early Cretaceous.1 2

Its skeleton is about 54% complete, making it the most complete pachycephalosaur ever found.1

It is the first pachycephalosaur to preserve hand bones and a mass of gastroliths (stomach stones).1 2

Unlike later dome-heads, Zavacephale's dome was made mostly of the frontal bone, with little help from the parietal bone.1

The tail of Zavacephale was covered in stiff tendons, but they did not form the 'caudal basket' seen in later pachycephalosaurs.1

The dome grew early in life, before the animal reached full size, which suggests it was important for social displays or head-butting even in young animals.2

Ekifaananyi kya Zavacephale ekyakolebwa AI, nga kiraga engeri gye yayinza okuba ng'afaanana, ekyakolebwa kompyuta okusinziira ku ebyo bannassaayansi bye bamanyi. Kuteebereza: ekisolo ekyennyini kiyinza okuba nga kyali kifaanana bulala, era tewali amanyi langi zaakyo ez'amazima.

wabuuza

Ebibuuzo ebisinga okubuuzibwa ku Zavacephale

?How big was Zavacephale?

About 1 metre long and weighed around 5.85 kilograms. That is about the size of a large domestic cat.1 3

?What did Zavacephale eat?

It was a plant-eater. It swallowed small stones called gastroliths to help grind up tough plants in its stomach.4 2

?Did Zavacephale have feathers?

The fossils don't show feathers, so scientists aren't sure. No feathers have been found on any pachycephalosaur.1

?Why did Zavacephale have a dome?

It probably used its thick, bony dome for head-butting contests with rivals, like rams do. The dome may also have been used for display to attract mates.4

?When did Zavacephale live?

It lived about 119 to 100 million years ago, during the Early Cretaceous Period. That makes it the oldest known dome-headed dinosaur.1

?Where was Zavacephale found?

Its fossil was discovered in the Gobi Desert of Mongolia, in the Khuren Dukh Formation.1 3

Omumenyi w'enfumo

Enfumo: Some people think all dome-headed dinosaurs used their domes for ramming each other like bighorn sheep.

Amazima: Scientists are not sure. Zavacephale's dome was well developed even in a young animal, so it might have been for showing off or fighting, but the exact use is still debated.2

Eri abakugu mu dayinoso

Erinnya lya ssaayansi: Zavacephale
Yatuumibwa: Chinzorig et al. 20255
Ekibinja: Ez'emitwe egy'enkulungo
Ekika / ekibinja: Pachycephalosauria5
Engabanya: Ornithischia > Pachycephalosauria5
Emyaka gy'enjazi: emyaka obukadde 120 okutuuka ku 100 (Aptian / Albian)5
Ensengeka z'enjazi: Khuren Dukh5
Ensi: Mongoliya5
Ebisigalira ebyazuulibwa: 1 mu The Paleobiology Database5
Okuzuulibwa: The fossil was found in 2019 in the Khuren Dukh Formation of Mongolia, and it was formally named by Tsogtbaatar Chinzorig and colleagues in 2025.1 2
Kikyakubaganyizibwako ebirowoozo: Scientists are still debating how the dome was used, whether for head-butting, display, or something else.2

Ebituufu gye biva

Zavacephale (en.wikipedia.org)
A domed pachycephalosaur from the early Cretaceous of Mongolia | Nature (nature.com)
Best fossil of a dome-headed dinosaur is unearthed in Mongolia | Reuters (reuters.com)
New dome-headed dinosaur species is the most complete pachycephalosaur ever found | Natural History Museum (nhm.ac.uk)
Zavacephale in The Paleobiology Database (CC BY 4.0): emyaka, ebifo, ensengeka z'enjazi, engabanya.

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