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Acrotholus

Izenaren esanahia: “highest dome”1

Jaten zuen: LandareakKupula-buruakGoi Kretazeoa

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

Bizi izan zen

Duela 86 eta 84 milioi urte artean4

Goi Kretazeoa

Fosilak hemen aurkitu dira:

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

Luzera

1,8288 m (6 ft)3

Pisua

40 kg (88 lb)3 1 2

Abiadura maximoa

44 km/h inguru (27 mph)

Korrika egitea, kalkulua

Noiz bizi izan zen?

Triasikoa

Jurasikoa

Kretazeoa

Duela 252 milioi urte20114566, asteroidea

Zein handia zen?

Zein luzea zen?

Zein astuna zen?

2 txakur bezain astun

4 etxeko katu bezain luze, sudurretik buztanerabata bestearen atzean jarritako 10 banana bezain luze10 etxeko katu bezain astun8 angurria bezain astunhaur-eskolako 2 haur bezain astun1 eskolaume bezain astun100 metro 8,2 segundotan egin zitzakeen korrika (gizakirik azkarrenak 9,6 behar ditu)

Zein handia zen Acrotholus ZUREKIN alderatuta?

Zure nabigatzaileko kalkulu hutsak. Ez da ezer gordetzen ez inora bidaltzen.

Zein azkarra zen?

Pertsona bat oinez 5 km/h inguru (3 mph)

Haur bat bizikletan 12 km/h inguru (7 mph)

Acrotholus 44 km/h inguru (27 mph)

Zaldi bat lauhazka 65 km/h inguru (40 mph)

Gepardo bat 100 km/h inguru (62 mph)

gauza bikainak

Datu dibertigarriak

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

Acrotholus: AAk egindako irudia — Acrotholus nolakoa izan zitekeen erakusten duen AAk egindako irudia, ordenagailu batek zientzialariek dakitenetik sortua. Asmakizun bat da: benetako animalia desberdina izan zitekeen, eta inork ez daki zein ziren bere benetako koloreak.

zure galderak

Acrotholus: gehien egindako galderak

?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

Mito-hauslea

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

Egia: 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

Dino adituentzat

Izen zientifikoa: Acrotholus
Izendatzailea:: Evans et al. 20134
Taldea: Kupula-buruak
Familia / klada: Pachycephalosauridae4
Sailkapena: Ornithischia > Pachycephalosauria4
Arroken adina: 86 eta 84 milioi urte artean (Santonian)4
Arroka-formazioak: Milk River4
Herrialdeak: Kanada4
Fosil-erregistroak: 1 The Paleobiology Database datu-basean4
Aurkikuntza: 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
Oraindik eztabaidagai: 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

Datuak nondik datozen

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): adina, tokiak, arroka-formazioak, sailkapena.

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