Carta da dino nr. 1857 da 2 027

Umoonasaurus

Il num vul dir: “lizard of the Coober Pedy area, named after the local Antakirinja word 'Umoona'”1

Mangiava: CharnPlesiosaursCretacic temprivTecnicamain betg in dinosaur

Umoonasaurus was a small, crested marine reptile that swam in cold seas near Antarctica about 115 million years ago. It had three bony crests on its head, like a tiny underwater dinosaur, but it was actually a plesiosaur, not a dinosaur. Its fossils are famous because they are preserved in beautiful blue opal.1 2

Fatg divertent: quest reptil da mar nudava, entant ch'ils dinosaurs chaminavan sin terra. Tuts als numnan dinos, ma els eran in'autra rama dals reptils.

Viveva

avant 121 fin 100 milliuns onns5

Cretacic tempriv

Fossils chattads en

South Australia, in opal mines near Coober Pedy, Andamooka, and other areas1

Lunghezza

2,5 m (8,2 ft)1 2

Spertadad maximala

var 26 km/h (16 mph)

Nudar, stima

Cura viveva el?

Triassic

Giurassic

Cretacic

avant 252 milliuns onns20114566, l'asteroid

Quant grond era el?

Quant lung era el?

uschè lung sco 2,5 chauns dal nas a la cuauschè lung sco 14 bananas ina suenter l'autrapudess nudar la lunghezza d'ina gronda piscina (50 m) en 6,9 secundas

Quant grond era Umoonasaurus cumpareglià cun TAI?

Mo matematica en tes navigatur. Nagut na vegn arcunà u tramess.

Quant spert era el?

Ina persuna che va a pe var 5 km/h (3 mph)

In uffant sin il velo var 12 km/h (7 mph)

Umoonasaurus var 26 km/h (16 mph)

In chaval che galoppescha var 65 km/h (40 mph)

In gepard var 100 km/h (62 mph)

chaussas cool

Fatgs divertents

Umoonasaurus is known from several partial skeletons, and one of them is the most complete opalized vertebrate fossil ever found.1

It had three thin, blade-like crests on its skull: one along the top of its snout and a pair above its eyes. These crests may have been used for display, like a peacock's tail.1

Umoonasaurus lived in a cold, high-latitude inland sea near the South Pole, where water temperatures were near freezing.1 2

It was a small plesiosaur, only about 2.5 metres (8 feet) long as an adult. A juvenile specimen was less than 1 metre long.1

Umoonasaurus is the most primitive and also the last surviving member of its group, the rhomaleosaurids. It lived about 115 million years ago.1 2

Its tail ended in a 'pygostyle-like' structure made of fused vertebrae, similar to the tail tip of some modern birds.1

Maletg da Umoonasaurus fatg cun IA — In maletg fatg cun IA che mussa co Umoonasaurus pudess avair guardà ora, fatg d'in computer tenor quai che la scienza sa. I sa tracta d'ina supposiziun: l'animal vair ha forsa guardà ora auter, e sias colurs vairas èn nunenconuschentas.

tias dumondas

Las dumondas las pli frequentas davart Umoonasaurus

?What did Umoonasaurus eat?

Umoonasaurus ate small fish. Preserved gut contents show it ate small teleost fish.1

?Why did Umoonasaurus have crests?

Scientists think the three crests on its skull were used for display, like a peacock's tail, to help recognise each other or attract mates. They were too fragile for fighting.1

?Was Umoonasaurus a dinosaur?

No, Umoonasaurus was a plesiosaur, a type of marine reptile with four flippers. It was not a dinosaur.3 4 1

Per experts da dinos

Num scientific: Umoonasaurus
Numnà da: Kear et al. 20065
Gruppa: Plesiosaurs
Famiglia / clada: Leptocleididae5
Classificaziun: Plesiosauria > Sauropterygia5
Vegliadetgna da la crappa: 121 fin 100 milliuns onns (Aptian / Albian)5
Formaziuns da crap: Bulldog Shale5
Pajais: Australia5
Chats da fossils: 4 en The Paleobiology Database5
Scuverta: Umoonasaurus was named in 2006 by Benjamin Kear and colleagues. The holotype skeleton, nicknamed 'Eric', was bought by public donations and is preserved in opal from the Zorba Extension Opal Field near Coober Pedy, Australia.1
Anc discutà: Scientists are not sure what the three crests on its head were used for. They were too fragile for fighting, so they might have been for display or recognizing other Umoonasaurus.1

Danunder che vegnan ils fatgs

An archaic crested plesiosaur in opal from the Lower Cretaceous high-latitude deposits of Australia (pmc.ncbi.nlm.nih.gov)
An archaic crested plesiosaur in opal from the Lower Cretaceous high-latitude deposits of Australia (royalsocietypublishing.org)
Umoonasaurus (en.wikipedia.org)
Umoonasaurus demoscyllus - The Australian Museum (australian.museum)
Umoonasaurus in The Paleobiology Database (CC BY 4.0): vegliadetgna, lieus, formaziuns da crap, classificaziun.

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