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Khathune ya Acristavus
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Acristavus

Lebitso le bolela: “crestless grandfather”1
E jele: DimelaMelomo ya letataKretase ya Morao

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

E phetse
dilemo tse dimilione tse 84 ho isa ho 72 tse fetileng5
Kretase ya Morao
Difosili di fumanwe ho
Montana and Utah, USA5
Bolelele
8 ho isa ho 9 m (26 ho isa ho 30 ft)1
Boima
ditone tse 2 ho isa ho ditone tse 3 (4,400 ho isa ho 6,600 lb)1
Bophahamo
2.5 ho isa ho 3 m (8.2 ho isa ho 9.8 ft)1
Lebelo le phahameng ka ho fetisisa
e ka bang 26 km/h (16 mph)
Ho matha, kakanyo

E phetse neng?

Triasiki
Jurasiki
Kretase
Dilemo tse dimilione tse 252 tse fetileng20114566, asteroiti

E ne e le kgolo hakae?

E ne e le telele hakae?

Acristavus bolelele ba e ka bang 9 m (30 ft)Baesekele ya motho e moholo e ka bang 1.8 m (5.9 ft)Koloi e ka bang 4.5 m (15 ft)Tlou, phoofolo e kgolo ka ho fetisisa naheng kajeno e ka bang 6.5 m (21 ft)

E ne e phahame hakae?

Ntjae ka bang 0.5 m (1.6 ft)Peree ka bang 1.6 m (5.2 ft)Acristavusbophahamo ba e ka bang 3 m (9.8 ft)Tloue ka bang 3.2 m (10 ft)

E ne e le boima hakae?

boima jwaloka dikoloi tse 2
telele jwaloka dikoloi tse 2 tse pakilweng ka molatelele jwaloka dibanana tse 50 di behilwe ka molaboima jwaloka dintja tse 150boima jwaloka mahapu a 600boima jwaloka ditlelase tse feletseng tse 4 tsa bana ba sekoloboima jwaloka dibere tse tshweu tse 7e ne e ka matha dimitara tse 100 ka metsotswana e 14 (motho ya lebelo ka ho fetisisa o hloka 9,6)

Acristavus e ne e le kgolo hakae ha e bapiswa le WENA?

Ke dipalo feela ho browser ya hao. Ha ho letho le bolokwang kapa le romelwang kae kapa kae.

E ne e le lebelo hakae?

dintho tse monate

Dintlha tse monate

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

E entswe ke AISetshwantsho sa Acristavus se entsweng ke AI
Setshwantsho se entsweng ke AI, se bontshang kamoo Acristavus e ka beng e ne e shebahala kateng, se entswe ke khomphutha ho ya ka seo bo-ramahlale ba se tsebang. Ke ho hakanya feela: phoofolo ya nnete e ka nna ya ba e ne e shebahala ka tsela e nngwe, mme ha ho motho ya tsebang mebala ya yona ya nnete.
o botsitse

Dipotso tse botswang haholo ka Acristavus

?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

Bakeng sa ditsebi tsa didinosaure

Lebitso la saense
Acristavus
E rehilwe ke
Gates et al. 20115
Sehlopha
Melomo ya letata
Lelapa / leloko
Hadrosauridae5
Tlhophiso
Ornithischia > Ornithopoda > Iguanodontia > Hadrosauridae5
Dilemo tsa mafika
dilemo tse dimilione tse 84 ho isa ho 72 (Campanian)5
Dibopeho tsa mafika
Two Medicine, Wahweap5
Dinaha
Amerika5
Direkoto tsa difosili
2 ho The Paleobiology Database5
Ho sibollwa
Acristavus was named by Terry A. Gates, Jack Horner, and colleagues in 2011. The first fossils were found in Montana and Utah.1
E sa ntse e phehwa kgang
Scientists are not sure why Acristavus lacked a head crest while many other duck-billed dinosaurs had one.1

Moo dintlha di tswang teng

  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): dilemo, dibaka, dibopeho tsa mafika, tlhophiso.

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