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Acrotholus

Izina risobanura: “highest dome”1

Yaryaga: IbimeraImitwe y'ikibumbeKiretase ya nyuma

Acrotholus was a small, plant-eating dinosaur with a thick, bony dome on its head. It lived about 84 million years ago in what is now Canada. This dome might have been used for head-butting contests between rivals!1 2

Yabayeho

hashize imyaka miliyoni 86 kugeza 844

Kiretase ya nyuma

Ibisigazwa byabonetse muri

Fossils were found in the Milk River Formation in southern Alberta, Canada, near Writing-On-Stone Provincial Park.2 1

Uburebure

1,8288 m (6 ft)3

Uburemere

40 kg (88 lb)3 1 2

Umuvuduko wo hejuru

nka 44 km/h (27 mph)

Kwiruka, igereranya

Yabayeho ryari?

Triyasike

Jurasike

Kiretase

Hashize miliyoni 252 z'imyaka20114566, asiteroyide

Yanganaga ite?

Yari ndende ite?

Yari iremereye ite?

iremereye nk'imbwa 2

ndende nk'injangwe 4 zo mu rugo zikurikiranyendende nk'imineke 10 ikurikiranyeiremereye nk'injangwe 10 zo mu rugoiremereye nk'imbuto 8 za watermeloniremereye nk'abana 2 bo mu ishuri ry'incukeiremereye nk'abanyeshuri 1yashoboraga kwiruka metero 100 mu masegonda 8,2 (umuntu wihuta kurusha abandi akenera 9,6)

Acrotholus yanganaga ite ugereranyije NAWE?

Ni imibare gusa ibarirwa muri mushakisha yawe. Nta kintu kibikwa cyangwa cyoherezwa ahandi.

Yihutaga ite?

Umuntu ugenda n'amaguru nka 5 km/h (3 mph)

Umwana ku igare nka 12 km/h (7 mph)

Acrotholus nka 44 km/h (27 mph)

Ifarashi yiruka cyane nka 65 km/h (40 mph)

Ingwe yihuta cyane nka 100 km/h (62 mph)

utuntu twiza cyane

Utuntu dushimishije

Acrotholus is the oldest known pachycephalosaur from North America, and possibly the world.2

Its dome was very thick, up to 55 millimetres (about 2 inches) above the brain, which is almost half the total length of the dome.2

The dome was fully developed even though Acrotholus lived earlier than other pachycephalosaurs, showing that this feature evolved earlier than scientists thought.2

The name Acrotholus means 'highest dome' in Greek, referring to its thick skull roof.1

The species name audeti honors Roy Audet, a rancher who allowed scientists to dig on his land where the first skull was found.1 2

Acrotholus had a smooth dome without the bumps or grooves seen in some other pachycephalosaurs, which suggests the known fossils are from adults.2

Ishusho ya Acrotholus yakozwe na AI — Ishusho yakozwe na AI yerekana uko Acrotholus ishobora kuba yari isa, yakozwe na mudasobwa hashingiwe ku byo abahanga bazi. Ni ugukeka gusa: inyamaswa nyayo ishobora kuba yari isa ukundi, kandi nta muntu uzi amabara yayo nyayo.

wabajije

Ibibazo bibazwa cyane kuri Acrotholus

?How big was Acrotholus?

Acrotholus was a small dinosaur, weighing 40 kg (88 lb) or less. Its skull dome was about 55 mm (2.2 in) thick.1 2

?What did Acrotholus eat?

Acrotholus was a plant-eating dinosaur, like other pachycephalosaurs.1

?Why did Acrotholus have a dome on its head?

The dome was probably used for head-butting contests between rivals, though scientists debate exactly how they used it.1

?When did Acrotholus live?

Acrotholus lived about 84 to 83.5 million years ago, during the Late Cretaceous period.1

Gusenya ibinyoma

Ibivugwa: Some people think Acrotholus used its dome to butt heads like bighorn sheep.

Ukuri: Scientists are not sure. The dome might have been for display or for fighting, but there is no direct evidence of head-butting in Acrotholus.1

Ku bazobereye muri dinozore

Izina rya siyansi: Acrotholus
Yiswe na: Evans et al. 20134
Itsinda: Imitwe y'ikibumbe
Umuryango / ishami: Pachycephalosauridae4
Ishyirwa mu byiciro: Ornithischia > Pachycephalosauria4
Imyaka y'amabuye: imyaka miliyoni 86 kugeza 84 (Santonian)4
Inzego z'amabuye: Milk River4
Ibihugu: Kanada4
Ibisigazwa byanditswe: 1 muri The Paleobiology Database4
Ivumburwa: The first fossil, a nearly complete skull dome, was found on Roy Audet's ranch in Alberta, Canada, and was named by David Evans and colleagues in 2013.1 2
Biracyagibwaho impaka: Scientists still debate whether the dome was used for fighting between males or for showing off to mates, since no complete skeleton has been found.1

Aho amakuru yakuwe

Acrotholus (en.wikipedia.org)
The oldest North American pachycephalosaurid and the hidden diversity of small-bodied ornithischian dinosaurs | Nature Communications (nature.com)
Study of new 'bone-head' hints at higher diversity of small dinosaurs | EurekAlert! (eurekalert.org)
Acrotholus in The Paleobiology Database (CC BY 4.0): imyaka, ahantu, inzego z'amabuye, ishyirwa mu byiciro.

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