Dinokaart nr. 0021 van 2 027

Acrotholus

Naam beteken: “highest dome”1

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

Het geleef

86 tot 84 miljoen jaar gelede4

Laat Kryt

Fossiele gevind in

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

Lengte

1,8288 m (6 ft)3

Gewig

40 kg (88 lb)3 1 2

Topspoed

omtrent 44 km/h (27 mph)

Hardloop, skatting

Wanneer het dit geleef?

Trias

Jura

Kryt

252 miljoen jaar gelede20114566, die asteroïde

Hoe groot was dit?

Hoe lank was dit?

Hoe swaar was dit?

so swaar soos 2 honde

so lank soos 4 huiskatte van neus tot stertso lank soos 10 piesangs punt aan puntso swaar soos 10 huiskatteso swaar soos 8 waatlemoeneso swaar soos 2 kleuterskoolkindersso swaar soos 1 skoolkinderskon 100 meter in 8,2 sekondes hardloop (die vinnigste mens het 9,6 nodig)

Hoe groot was Acrotholus vergeleke met JOU?

Net wiskunde in jou blaaier. Niks word gestoor of êrens heen gestuur nie.

Hoe vinnig was dit?

'n Mens wat loop omtrent 5 km/h (3 mph)

'n Kind op 'n fiets omtrent 12 km/h (7 mph)

Acrotholus omtrent 44 km/h (27 mph)

'n Galopperende perd omtrent 65 km/h (40 mph)

'n Jagluiperd omtrent 100 km/h (62 mph)

cool goed

Prettige feite

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

KI-prent van Acrotholus — 'n KI-prent van hoe Acrotholus dalk gelyk het, deur 'n rekenaar gemaak uit wat wetenskaplikes weet. Dit is 'n raaiskoot: die regte dier het dalk anders gelyk, en niemand weet wat sy regte kleure was nie.

julle het gevra

Mees gevraagde vrae oor 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

Mite-breker

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

Waarheid: 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

Vir dino-kenners

Wetenskaplike naam: Acrotholus
Benoem deur: Evans et al. 20134
Groep: Koepelkoppe
Familie / klade: Pachycephalosauridae4
Klassifikasie: Ornithischia > Pachycephalosauria4
Ouderdom van die rotse: 86 tot 84 miljoen jaar (Santonian)4
Rotsformasies: Milk River4
Lande: Kanada4
Fossielrekords: 1 in The Paleobiology Database4
Ontdekking: 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
Steeds omstrede: 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

Waar die feite vandaan kom

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): ouderdom, plekke, rotsformasies, klassifikasie.

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