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Acristavus kartun
Dino kad No. 0019 wɔ 2 027 mu

Acristavus

Din no ase: “crestless grandfather”1
Ɔdii: NhabanDabodabo ano dinoKretasias Awieeɛ

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.12

Ɔtenaa ase
mfeɛ ɔpepem 84 kɔsi 72 a atwam5
Kretasias Awieeɛ
Wɔhunuu fɔsil wɔ
Montana and Utah, USA5
Tenten
8 kɔsi 9 m (26 kɔsi 30 ft)1
Mu duru
ton 2 kɔsi ton 3 (4,400 kɔsi 6,600 lb)1
Korɔn
2.5 kɔsi 3 m (8.2 kɔsi 9.8 ft)1
Ntɛmntɛm a ɛsen biara
bɛyɛ 26 km/h (16 mph)
Mmirikatuo, nsusuiɛ

Berɛ bɛn na ɛtenaa ase?

Triasik
Jurasik
Kretasias
mfeɛ ɔpepem 252 a atwam20114566, ɔsoro ɛboɔ no

Na ne kɛseɛ yɛ sɛn?

Na ne tenten yɛ sɛn?

Acristavus ne tenten bɛyɛ 9 m (30 ft)Ɔpanin sakre bɛyɛ 1.8 m (5.9 ft)Kaa bɛyɛ 4.5 m (15 ft)Ɔsono, asase so aboa a ɔsõ sen biara nnɛ bɛyɛ 6.5 m (21 ft)

Na ne korɔn yɛ sɛn?

Kramanbɛyɛ 0.5 m (1.6 ft)Ɔpɔnkɔbɛyɛ 1.6 m (5.2 ft)Acristavusne korɔn bɛyɛ 3 m (9.8 ft)Ɔsonobɛyɛ 3.2 m (10 ft)

Na ne mu yɛ duru sɛn?

ne mu duru te sɛ kaa 2
ne tenten te sɛ kaa 2 a wɔde agyina toatoa sone tenten te sɛ kwadu 50 a wɔde abɔ toatoa sone mu duru te sɛ nkraman 150ne mu duru te sɛ watamɛlɔn 600ne mu duru te sɛ sukuu klaas mũ 4 mu mmofrane mu duru te sɛ polar bea 7anka ɔbɛtumi atu mmirika mita 100 wɔ sikɛn 14 mu (onipa a ɔyɛ ntɛm sen biara hia 9.6)

Acristavus kɛseɛ yɛ sɛn sɛ wode toto WO ho a?

Akontaa nko ara wɔ wo browser mu. Yɛnkora biribiara so, na yɛmmfa biribiara nkɔ baabiara.

Na ɛyɛ ntɛm sɛn?

nneɛma a ɛyɛ fɛ

Nsɛm a ɛyɛ anigye

1

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

2

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

3

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

4

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

5

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

6

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

AI na ɛyɛeɛAcristavus mfonini a AI yɛeɛ
Yei yɛ Acristavus mfonini a AI yɛeɛ, sɛdeɛ ebia na ɔteɛ. Kɔmputa na ɛyɛeɛ firi deɛ nyansahufoɔ nim mu. Ɛyɛ nsusuiɛ: ebia na aboa ankasa no nte saa, na obiara nnim ne kɔla ankasa.
wobisaeɛ

Nsɛm a wɔbisa bebree fa Acristavus ho

?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.35

?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.34

?What did Acristavus eat?

Acristavus was a plant-eater (herbivore). It ate ferns, leaves and other plants that grew in its wet, seasonal habitat.53

?When did Acristavus live?

Acristavus lived about 79 to 81 million years ago, during the Campanian stage of the Late Cretaceous.35

Ma dino ho animdefoɔ

Nyansahu din
Acristavus
Obi a ɔtoo din
Gates et al. 20115
Kuo
Dabodabo ano dino
Abusua / kuo kɛseɛ
Hadrosauridae5
Nkyekyɛmu
Ornithischia > Ornithopoda > Iguanodontia > Hadrosauridae5
Abotan no mfeɛ
mfeɛ ɔpepem 84 kɔsi 72 (Campanian)5
Abotan nhyehyɛeɛ
Two Medicine, Wahweap5
Aman
Amerika5
Fɔsil nkyerɛwee
2 wɔ The Paleobiology Database mu5
Nhunumu
Acristavus was named by Terry A. Gates, Jack Horner, and colleagues in 2011. The first fossils were found in Montana and Utah.1
Wɔda so gye ho akyinnye
Scientists are not sure why Acristavus lacked a head crest while many other duck-billed dinosaurs had one.1

Baabi a nsɛm no firi

  1. PBDB Taxon (paleobiodb.org)
  2. Acristavus Gates et al. 2011 - Encyclopedia of Life (eol.org)
  3. Acristavus (Wikipedia) (Wikipedia)
  4. Acristavus: North America’s New Hadrosaur (smithsonianmag.com)
  5. Acristavus in The Paleobiology Database (CC BY 4.0): mfeɛ, mmeaeɛ, abotan nhyehyɛeɛ, nkyekyɛmu.

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