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Cartoon da Argentinonectes
Carta da dino nr. 0164 da 2 027

Argentinonectes

Il num vul dir: “Lake Argentino swimmer”1
Mangiava: CharnPlesiosaursCretacic tardivTecnicamain betg in dinosaur

Argentinonectes was a huge, long-necked marine reptile that swam in the seas near Antarctica 66 million years ago. It had four flipper-like legs and a stiff tail that may have had a fin on the end. This plesiosaur is the most complete one ever found in Argentina!1

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 72 fin 66 milliuns onns3
Cretacic tardiv
Fossils chattads en
Calafate Formation, Santa Cruz Province, Argentina12
Lunghezza
7 fin 9 m (23 fin 30 ft)1
Spertadad maximala
var 23 km/h (14 mph)
Nudar, stima

Cura viveva el?

Triassic
Giurassic
Cretacic
avant 252 milliuns onns20114566, l'asteroid

Quant grond era el?

Quant lung era el?

Argentinonectes var 9 m lung (30 ft)In velo da creschids var 1,8 m (5,9 ft)In auto var 4,5 m (15 ft)In elefant, il pli grond animal da terra dad oz var 6,5 m (21 ft)
uschè lung sco 2 autos parcads in suenter l'auteruschè lung sco 50 bananas ina suenter l'autrapudess nudar la lunghezza d'ina gronda piscina (50 m) en 7,8 secundas

Quant grond era Argentinonectes cumpareglià cun TAI?

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

Quant spert era el?

chaussas cool

Fatgs divertents

1

The fossil was found under 50 cm (20 inches) of water in Lake Argentino, making it tricky to dig out.1

2

Its rib cage and belly bones were very stiff, which helped it dive without its lungs collapsing.1

3

Shark teeth and scratches on its bones show that sharks ate the dead plesiosaur's body.1

4

The tail had eight tightly locked vertebrae at the tip, probably supporting a small tail fin.1

5

Its forelimbs were about 1.8 metres (5.9 feet) long, and the hindlimbs were a bit shorter at 1.3 metres (4.3 feet).1

6

The skeleton is missing the skull and most of the neck, possibly because they floated away after death.1

Fatg cun IAMaletg da Argentinonectes fatg cun IA
In maletg fatg cun IA che mussa co Argentinonectes 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 Argentinonectes

?How big was Argentinonectes?

It was about 7 to 9 metres (23 to 30 feet) long. That is roughly as long as a school bus.1

?What did Argentinonectes eat?

Scientists do not know for sure because the skull is missing. But like other plesiosaurs, it probably ate fish and squid.1

?When did Argentinonectes live?

It lived at the very end of the Cretaceous Period, about 66 million years ago.1

?Is Argentinonectes a dinosaur?

No, it is a plesiosaur, a marine reptile that swam in the ocean. It is not a dinosaur.1

Chatschader da mitus

Mitus: Some people think all plesiosaurs were slow and clumsy on land.

Vardad: Argentinonectes and other plesiosaurs were fully aquatic and never came onto land. They were fast swimmers in the ocean.1

Per experts da dinos

Num scientific
Argentinonectes
Numnà da
Novas et al. 20263
Gruppa
Plesiosaurs
Famiglia / clada
Elasmosauridae3
Classificaziun
Plesiosauria > Elasmosauridae > Sauropterygia3
Vegliadetgna da la crappa
72 fin 66 milliuns onns (Maastrichtian)3
Formaziuns da crap
Calafate3
Pajais
Argentinia3
Chats da fossils
1 en The Paleobiology Database3
Scuverta
The fossil was found in 2009 in Lake Argentino, Argentina, and was named Argentinonectes calafatensis by Fernando Novas and colleagues in 2026.1
Anc discutà
Scientists are not sure why the skull and neck are missing. They may have been eroded by waves or detached when the body bloated and floated.1

Danunder che vegnan ils fatgs

  1. Argentinonectes (en.wikipedia.org)
  2. PBDB Taxon (paleobiodb.org)
  3. Argentinonectes in The Paleobiology Database (CC BY 4.0): vegliadetgna, lieus, formaziuns da crap, classificaziun.

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Dapli da la medema gruppa: Plesiosaurs

Era dal medem temp: Cretacic tardiv

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