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Alvarezsaurus

Izenaren esanahia: “Don Gregorio Alvarez's lizard”1

Jaten zuen: IntsektuakDino lumadun bitxiakGoi Kretazeoa

Alvarezsaurus was a tiny, fast-running dinosaur that lived in Argentina about 86 to 83 million years ago. It had a long tail and probably used its sharp claws to dig for insects. Scientists think it was one of the earliest members of a weird group of dinosaurs with strong, short arms.1 3

Bizi izan zen

Duela 86 eta 84 milioi urte artean3

Goi Kretazeoa

Fosilak hemen aurkitu dira:

Bajo de la Carpa Formation, Neuquén, Argentina3 1

Luzera

1 eta 1,4 m artean (3,3 eta 4,6 ft artean)1

Pisua

3 kg (7 lb)1

Altuera

0,58 m (1,9 ft)

kalkulua

Abiadura maximoa

30 km/h inguru (19 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?

25 banana bezain astun

3 etxeko katu bezain luze, sudurretik buztanerabata bestearen atzean jarritako 8 banana bezain luzeetxeko katu bat bezain astun, gutxi gorabehera25 banana bezain astun100 metro 12 segundotan egin zitzakeen korrika (gizakirik azkarrenak 9,6 behar ditu)

Zein handia zen Alvarezsaurus 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)

Alvarezsaurus 30 km/h inguru (19 mph)

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

Gepardo bat 100 km/h inguru (62 mph)

gauza bikainak

Datu dibertigarriak

Alvarezsaurus was named after Don Gregorio Alvarez, an Argentine historian, not after a dinosaur scientist.1

Its third toe bone (metatarsal III) was the longest, and its fourth toe bone was unusually long too.1

Unlike many of its later relatives, Alvarezsaurus did not have its ankle bones (astragalus and calcaneum) fused together.1

The shoulder blade of Alvarezsaurus was curved and smaller than that of later alvarezsaurids like Mononykus.1

Its tail vertebrae had sharp undersides and triangular side projections, a feature shared with other alvarezsaurids.1

Alvarezsaurus is considered a basal (early) member of the alvarezsaurid family, which includes dinosaurs with strong, short arms and big claws.1

Alvarezsaurus: AAk egindako irudia — Alvarezsaurus 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

Alvarezsaurus: gehien egindako galderak

?How big was Alvarezsaurus?

Alvarezsaurus was small, about 1 to 1.4 metres (3.3 to 4.6 feet) long and weighed around 3 kilograms (6.6 pounds).1

?What did Alvarezsaurus eat?

It may have eaten insects. Its sharp claws and strong arms suggest it dug into termite or ant nests, though scientists are not completely sure.1 2

?Could Alvarezsaurus run fast?

Yes, its leg structure suggests it was a fast runner. It had long legs and a long tail for balance.1 2

?Did Alvarezsaurus have feathers?

No direct feather fossils are known for Alvarezsaurus, but a close relative, Shuvuuia, had downy, feather-like coverings, so it likely had feathers too.2

?When did Alvarezsaurus live?

It lived during the Late Cretaceous, about 86 to 83 million years ago, in what is now Argentina.1

?Was Alvarezsaurus a dinosaur?

Yes, Alvarezsaurus was a small theropod dinosaur, part of the alvarezsaurid family.1

Dino adituentzat

Izen zientifikoa: Alvarezsaurus
Izendatzailea:: Bonaparte 19913
Taldea: Dino lumadun bitxiak
Familia / klada: Alvarezsauridae3
Sailkapena: Theropoda > Alvarezsauridae3
Arroken adina: 86 eta 84 milioi urte artean (Santonian)3
Arroka-formazioak: Bajo de la Carpa3
Herrialdeak: Argentina3
Fosil-erregistroak: 1 The Paleobiology Database datu-basean3
Aurkikuntza: Alvarezsaurus was named by Argentine paleontologist José Bonaparte in 1991. The first fossils were found in the Bajo de la Carpa Formation in Argentina.1 3
Oraindik eztabaidagai: Scientists are not sure whether Alvarezsaurus was more closely related to birds or to other non‑bird dinosaurs. Some studies place it with early birds, but others keep it among the theropod dinosaurs.1

Datuak nondik datozen

Alvarezsaurus (en.wikipedia.org)
Alvarezsauridae (en.wikipedia.org)
Alvarezsaurus in The Paleobiology Database (CC BY 4.0): adina, tokiak, arroka-formazioak, sailkapena.

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