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Carta da dino nr. 0021 da 2 027

Acrotholus

Il num vul dir: “highest dome”1

Mangiava: PlantasChaus a cuplaCretacic tardiv

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

Viveva

avant 86 fin 84 milliuns onns4

Cretacic tardiv

Fossils chattads en

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

Lunghezza

1,8288 m (6 ft)3

Paisa

40 kg (88 lb)3 1 2

Spertadad maximala

var 44 km/h (27 mph)

Currer, stima

Cura viveva el?

Triassic

Giurassic

Cretacic

avant 252 milliuns onns20114566, l'asteroid

Quant grond era el?

Quant lung era el?

Quant grev era el?

uschè grev sco 2 chauns

uschè lung sco 4 giats da chasa dal nas a la cuauschè lung sco 10 bananas ina suenter l'autrauschè grev sco 10 giats da chasauschè grev sco 8 melunasuschè grev sco 2 uffants da scolettauschè grev sco 1 scolarspudess currer 100 meters en 8,2 secundas (il pli spert uman dovra 9,6)

Quant grond era Acrotholus cumpareglià cun TAI?

Mo matematica en tes navigatur. Nagut na vegn arcunà u tramess.

Quant spert era el?

Ina persuna che va a pe var 5 km/h (3 mph)

In uffant sin il velo var 12 km/h (7 mph)

Acrotholus var 44 km/h (27 mph)

In chaval che galoppescha var 65 km/h (40 mph)

In gepard var 100 km/h (62 mph)

chaussas cool

Fatgs divertents

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

Maletg da Acrotholus fatg cun IA — In maletg fatg cun IA che mussa co Acrotholus pudess avair guardà ora, fatg d'in computer tenor quai che la scienza sa. I sa tracta d'ina supposiziun: l'animal vair ha forsa guardà ora auter, e sias colurs vairas èn nunenconuschentas.

tias dumondas

Las dumondas las pli frequentas davart 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

Chatschader da mitus

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

Vardad: 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

Per experts da dinos

Num scientific: Acrotholus
Numnà da: Evans et al. 20134
Gruppa: Chaus a cupla
Famiglia / clada: Pachycephalosauridae4
Classificaziun: Ornithischia > Pachycephalosauria4
Vegliadetgna da la crappa: 86 fin 84 milliuns onns (Santonian)4
Formaziuns da crap: Milk River4
Pajais: Canada4
Chats da fossils: 1 en The Paleobiology Database4
Scuverta: 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
Anc discutà: 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

Danunder che vegnan ils fatgs

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): vegliadetgna, lieus, formaziuns da crap, classificaziun.

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