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Meraxes

Izenaren esanahia: “named after a dragon from the Song of Ice and Fire books, and gigas means giant in Greek”1

Jaten zuen: HaragiaDino haragijaleakBehe Kretazeoa

Meraxes was a huge, meat-eating dinosaur with very short arms, just like T. rex! It lived in what is now Argentina and had a skull longer than a tall adult human.1 2

Bizi izan zen

Duela 110 eta 106 milioi urte artean5

Behe Kretazeoa

Fosilak hemen aurkitu dira:

Huincul Formation, Neuquén Province, Patagonia, Argentina1 2

Luzera

9 eta 11,6 m artean (30 eta 38 ft artean)2

Pisua

4,263 tona (9 400 lb)1

Altuera

3,4 m (11 ft)

kalkulua

Abiadura maximoa

24 km/h inguru (15 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?

kalkulua

Zein astuna zen?

3 auto bezain astun

ilaran aparkatutako 2,5 auto bezain luzebata bestearen atzean jarritako 64 banana bezain luze210 txakur bezain astun850 angurria bezain astunhaurrez betetako 5 ikasgela oso bezain astun9 hartz zuri bezain astun100 metro 15 segundotan egin zitzakeen korrika (gizakirik azkarrenak 9,6 behar ditu)

Zein handia zen Meraxes 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)

Meraxes 24 km/h inguru (15 mph)

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

Gepardo bat 100 km/h inguru (62 mph)

gauza bikainak

Datu dibertigarriak

Meraxes had arms that were only about half the length of its thigh bone, similar to T. rex and other giant meat-eaters.1

Its skull was 1.27 metres (4.2 feet) long, as big as the skull of Acrocanthosaurus.2

Meraxes is the most complete carcharodontosaurid skeleton ever found in the Southern Hemisphere.1

The second toe of Meraxes had an enormous claw, almost twice as long as the claw on its fourth toe.2

This dinosaur lived about 100 to 90 million years ago during the Cretaceous Period.3

Meraxes may have lived to be between 39 and 53 years old, making it one of the longest-lived meat-eating dinosaurs known.2

Its bones show that Meraxes grew to a huge size by taking a long time to grow, not by growing faster.2

Meraxes: AAk egindako irudia — Meraxes 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

Meraxes: gehien egindako galderak

?How big was Meraxes?

About 9 to 10 metres long, and it weighed around 4.26 metric tons.2

?Did Meraxes have feathers?

The sources do not mention feathers on Meraxes. It is not known for sure, but many large theropods like Meraxes are usually shown without feathers.1 2

?Was Meraxes bigger than T. rex?

No, Meraxes was smaller than T. rex. T. rex could be over 12 metres long, while Meraxes was about 9 to 10 metres.2

?What did Meraxes eat?

Meraxes was a meat-eater that likely hunted large plant-eating dinosaurs, such as sauropods like Argentinosaurus and Limaysaurus that lived in the same area.2

?Why did Meraxes have tiny arms?

Scientists think its arms shrank as its head grew bigger, because the skull took over the job of catching prey. This happened in several giant meat-eating dinosaur groups, including Meraxes and T. rex.1 4

?When did Meraxes live?

Meraxes lived about 100 to 90 million years ago, during the Cretaceous Period.2

?Could Meraxes swim?

There is no information about whether Meraxes could swim. Like most large theropods, it probably stayed on land.2

?How fast could Meraxes run?

The sources do not give a speed for Meraxes. As a large predator, it was probably not very fast, but no exact speed is known.2

Dino adituentzat

Izen zientifikoa: Meraxes
Izendatzailea:: Canale et al. 20225
Taldea: Dino haragijaleak
Familia / klada: Carcharodontosauridae5
Sailkapena: Theropoda > Allosauroidea > Carcharodontosauridae5
Arroken adina: 110 eta 106 milioi urte artean (Albian)5
Arroka-formazioak: Huincul5
Herrialdeak: Argentina5
Fosil-erregistroak: 1 The Paleobiology Database datu-basean5
Aurkikuntza: The only known skeleton of Meraxes was found in 2012 in Argentina. Scientists named it in 2022 after a dragon from the Song of Ice and Fire books.2 1
Oraindik eztabaidagai: Scientists are not sure exactly how long Meraxes was, because different ways of measuring give different lengths.2

Datuak nondik datozen

New giant carnivorous dinosaur reveals convergent evolutionary trends in theropod arm reduction: Current Biology (cell.com)
Meraxes (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Newly discovered dinosaur had tiny arms like T. rex | National Geographic (nationalgeographic.com)
Meraxes in The Paleobiology Database (CC BY 4.0): adina, tokiak, arroka-formazioak, sailkapena.

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