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Karata ya dino No. 0019 mo go 2 027

Acristavus

Leina le raya: “crestless grandfather”1

E jele: DimelaMelomo-pidipidiBofelo jwa Cretaceous

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

E tshetse

dimilione tsa dingwaga di le 84 go ya go 72 tse di fetileng5

Bofelo jwa Cretaceous

Difosili di fitlhetswe kwa

Montana and Utah, USA5

Boleele

8 go ya go 9 m (26 go ya go 30 ft)1

Bokete

ditone di le 2 go ya go ditone di le 3 (4,400 go ya go 6,600 lb)1

Bogodimo

2.5 go ya go 3 m (8.2 go ya go 9.8 ft)1

Bonako jo bogolo

e ka nna 26 km/h (16 mph)

Go taboga, kakanyo

E tshetse leng?

Triassic

Jurassic

Cretaceous

dimilione tsa dingwaga di le 252 tse di fetileng20114566, asteroiti

E ne e le kgolo go le kae?

E ne e le telele go le kae?

E ne e le kwa godimo go le kae?

E ne e le bokete go le kae?

bokete jaaka dikoloi di le 2

telele jaaka dikoloi di le 2 di emisitswe mo molengtelele jaaka dibanana di le 50 di latelanabokete jaaka dintšwa di le 150bokete jaaka magapu a le 600bokete jaaka diphaposiborutelo tse di tletseng bana di le 4bokete jaaka dibere tse ditshweu di le 7e ne e ka taboga dimetara di le 100 mo metsotswaneng e le 14 (motho yo o bonako go gaisa o tlhoka 9,6)

Acristavus e ne e le kgolo go le kae fa e bapisiwa le WENA?

Ke dipalo fela mo sebatling sa gago. Ga go sepe se se bolokwang kgotsa se se romelwang gope.

E ne e le bonako go le kae?

Motho yo o tsamayang e ka nna 5 km/h (3 mph)

Ngwana mo baesekeleng e ka nna 12 km/h (7 mph)

Acristavus e ka nna 26 km/h (16 mph)

Pitse e e sianang ka bonako e ka nna 65 km/h (40 mph)

Lengau e ka nna 100 km/h (62 mph)

dilo tse di monate

Dintlha tse di monate

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

Setshwantsho sa Acristavus se se dirilweng ke AI — Setshwantsho se se dirilweng ke AI sa kafa Acristavus e ka tswang e ne e lebega ka gone, se dirilwe ke khomputara go ya ka se borasaense ba se itseng. Ke kakanyo fela: phologolo ya nnete e ka tswa e ne e lebega ka tsela e sele, mme ga go ope yo o itseng mebala ya yona ya nnete.

o botsitse

Dipotso tse di botswang thata ka ga 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.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

Ya baitseanape ba didino

Leina la saense: Acristavus
Leina le neilwe ke: Gates et al. 20115
Setlhopha: Melomo-pidipidi
Lelapa / clade: Hadrosauridae5
Thulaganyo: Ornithischia > Ornithopoda > Iguanodontia > Hadrosauridae5
Bogolo jwa matlapa: 84 go ya go 72 dimilione tsa dingwaga (Campanian)5
Dibopego tsa matlapa: Two Medicine, Wahweap5
Dinaga: Amerika5
Direkoto tsa difosili: 2 mo The Paleobiology Database5
Go fitlhelwa: Acristavus was named by Terry A. Gates, Jack Horner, and colleagues in 2011. The first fossils were found in Montana and Utah.1
Go sa ntse go ganetsanwa: Scientists are not sure why Acristavus lacked a head crest while many other duck-billed dinosaurs had one.1

Kwa dintlha di tswang teng

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): dingwaga, mafelo, dibopego tsa matlapa, thulaganyo.

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