Kartu dino No. 2006 ci 2 027

Zavacephale

Tur bi mooy: “origin head”1

Lekkoon: GàncaxBopp yu wërngelKretase bu jëkk

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

Dundoon

am na 120 ba 100 milyoŋ at5

Kretase bu jëkk

Fosil yu ñu gis ci

Khuren Dukh Formation, Dundgobi Province, Mongolia1 5

Guddaay

1 m (3,3 ft)1

Diisaay

5,85 kg (13 lb)1

Gaawaay bi gën a kawe

lu tollu ci 29 km/h (18 mph)

Daw, jortu

Kañ la dundoon?

Triyaas

Jurasik

Kretase

Am na 252 milyoŋ at20114566, asteroyid bi

Naka la réyoon?

Naka la guddoon?

Naka la diisoon?

diis ni 1,5 muusu kër

gudd ni 2 muusu kër, bakkan ba geengudd ni 6 banaana yu ñu topp-toppalelu tollu ci diisaayu muusu kërdiis ni 49 banaanamënoon na daw 100 meetar ci 12 segond (nit ki gën a gaaw dafay soxla 9,6)

Naka la Zavacephale réyoon, bu ñu ko méngalee ak YAW?

Ay kalkil rekk ci sa navigatëer. Dara du ñu denc, dara du ñu yónne fenn.

Naka la gaawoon?

Nit kuy dox lu tollu ci 5 km/h (3 mph)

Xale bu nekk ci welo lu tollu ci 12 km/h (7 mph)

Zavacephale lu tollu ci 29 km/h (18 mph)

Fas buy daw bu gaaw lu tollu ci 65 km/h (40 mph)

Segg bu gaaw lu tollu ci 100 km/h (62 mph)

yëf yu neex

Xibaar yu neex

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

Nataalu Zavacephale bu ñu def ak IA — Nataal bu IA def la, muy wone ni Zavacephale mën a meloon, ordinatëer moo ko def ci li boroom xam-xam yi xam. Jortu kese la: rab bi ci dëgg mën na meloon neneen, te kenn xamul ay kulëëram yu dëgg.

yeen a laaj

Laaj yi ñu gën a laaj ci 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

Ku tas léeb yu dul dëgg

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

Dëgg: 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

Ngir ñi xam dino lool

Turu xam-xam: Zavacephale
Ku ko tudde: Chinzorig et al. 20255
Kurél: Bopp yu wërngel
Njaboot / klad: Pachycephalosauria5
Klasifikasiyoŋ: Ornithischia > Pachycephalosauria5
Màggaayu doj yi: 120 ba 100 milyoŋ at (Aptian / Albian)5
Formasiyoŋi doj: Khuren Dukh5
Réew yi: Mongoli5
Fosil yu ñu gis: 1 ci The Paleobiology Database5
Gisees: 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
Ñu ngi koy werante ba tey: Scientists are still debating how the dome was used, whether for head-butting, display, or something else.2

Fa xibaar yi jóge

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): at, béréb yi, formasiyoŋi doj, klasifikasiyoŋ.

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