Dino txartela, 0019. zk. (2 027 guztira)

Acristavus

Izenaren esanahia: “crestless grandfather”1

Jaten zuen: LandareakAhate-mokoakGoi Kretazeoa

Acristavus was a duck-billed dinosaur that lived about 80 million years ago. It had no crest on its head, which is unusual for its family. This plant-eater walked on two legs and could also move on all fours.1 2

Bizi izan zen

Duela 84 eta 72 milioi urte artean5

Goi Kretazeoa

Fosilak hemen aurkitu dira:

Montana and Utah, USA5

Luzera

8 eta 9 m artean (26 eta 30 ft artean)1

Pisua

2 tona eta 3 tona artean (4 400 eta 6 600 lb artean)1

Altuera

2,5 eta 3 m artean (8,2 eta 9,8 ft artean)1

Abiadura maximoa

26 km/h inguru (16 mph)

Korrika egitea, kalkulua

Noiz bizi izan zen?

Triasikoa

Jurasikoa

Kretazeoa

Duela 252 milioi urte20114566, asteroidea

Zein handia zen?

Zein luzea zen?

Zein altua zen?

Zein astuna zen?

2 auto bezain astun

ilaran aparkatutako 2 auto bezain luzebata bestearen atzean jarritako 50 banana bezain luze150 txakur bezain astun600 angurria bezain astunhaurrez betetako 4 ikasgela oso bezain astun7 hartz zuri bezain astun100 metro 14 segundotan egin zitzakeen korrika (gizakirik azkarrenak 9,6 behar ditu)

Zein handia zen Acristavus 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)

Acristavus 26 km/h inguru (16 mph)

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

Gepardo bat 100 km/h inguru (62 mph)

gauza bikainak

Datu dibertigarriak

Acristavus means 'crestless grandfather' because it is one of the oldest known duck-billed dinosaurs without a head crest.1

Its fossils were found in the Two Medicine Formation of Montana and the Wahweap Formation of Utah.5

Acristavus lived during the Campanian stage of the Late Cretaceous, about 83 to 72 million years ago.1

It belonged to a group called Brachylophosaurini, which includes other duck-billed dinosaurs like Brachylophosaurus.1

The type specimen, named MOR 1155, is a partial skeleton that helped scientists identify this species.5

Acristavus was a ground-dwelling herbivore that laid eggs, like all duck-billed dinosaurs.2

Acristavus: AAk egindako irudia — Acristavus 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

Acristavus: gehien egindako galderak

?How big was Acristavus?

Scientists have not published a full size estimate yet, but as a hadrosaur it was probably around 8 to 9 metres (26 to 30 ft) long, about as long as a school bus.3 5

?Did Acristavus have a crest?

No. Acristavus is special because it had no crest or ornamentation on its skull, unlike most other duck-billed dinosaurs.3 4

?What did Acristavus eat?

Acristavus was a plant-eater (herbivore). It ate ferns, leaves and other plants that grew in its wet, seasonal habitat.5 3

?When did Acristavus live?

Acristavus lived about 79 to 81 million years ago, during the Campanian stage of the Late Cretaceous.3 5

Dino adituentzat

Izen zientifikoa: Acristavus
Izendatzailea:: Gates et al. 20115
Taldea: Ahate-mokoak
Familia / klada: Hadrosauridae5
Sailkapena: Ornithischia > Ornithopoda > Iguanodontia > Hadrosauridae5
Arroken adina: 84 eta 72 milioi urte artean (Campanian)5
Arroka-formazioak: Two Medicine, Wahweap5
Herrialdeak: AEB5
Fosil-erregistroak: 2 The Paleobiology Database datu-basean5
Aurkikuntza: Acristavus was named by Terry A. Gates, Jack Horner, and colleagues in 2011. The first fossils were found in Montana and Utah.1
Oraindik eztabaidagai: Scientists are not sure why Acristavus lacked a head crest while many other duck-billed dinosaurs had one.1

Datuak nondik datozen

PBDB Taxon (paleobiodb.org)
Acristavus Gates et al. 2011 - Encyclopedia of Life (eol.org)
Acristavus (Wikipedia) (Wikipedia)
Acristavus: North America’s New Hadrosaur (smithsonianmag.com)
Acristavus in The Paleobiology Database (CC BY 4.0): adina, tokiak, arroka-formazioak, sailkapena.

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