Isfjordosaurus
Isfjordosaurus was a small marine reptile that swam in the seas during the Early Triassic, about 248 million years ago. It looked a bit like a dolphin but was not a dinosaur. Its fossils were found on a cold Arctic island called Spitsbergen.13
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Isfjordosaurus is known from only a single upper arm bone, called a humerus, which makes it a mysterious animal.2
Some scientists are not sure if Isfjordosaurus was really an ichthyosaur, because the bone looks unusual.2
It lived during the Early Triassic, a time when ichthyosaurs were just starting to appear in the oceans.1
The name Isfjordosaurus comes from the Isfjord, a large fjord on Spitsbergen, where the fossil was found.1
The only known species is called Isfjordosaurus minor, and 'minor' means smaller, hinting it was a small reptile.1

Mito-hauslea
Mitoa: Some people think Isfjordosaurus was a dinosaur because it lived in the sea and had 'saurus' in its name.
Egia: Isfjordosaurus was an ichthyosaur, a marine reptile, not a dinosaur. Dinosaurs lived on land.1
Dino adituentzat
- Izen zientifikoa
- Isfjordosaurus
- Izendatzailea:
- Motani 19993
- Taldea
- Iktiosauroak
- Familia / klada
- Ichthyosauria3
- Sailkapena
- Ichthyosauria > Ichthyosauromorpha3
- Arroken adina
- 249 eta 247 milioi urte artean ()3
- Arroka-formazioak
- Vikinghøgda3
- Herrialdeak
- Svalbard3
- Fosil-erregistroak
- 1 The Paleobiology Database datu-basean3
- Aurkikuntza
- The fossil was first described by Carl Wiman in 1910, but the name Isfjordosaurus was given later by Ryosuke Motani in 1999.13
- Oraindik eztabaidagai
- Scientists still debate whether Isfjordosaurus was truly an ichthyosaur, because the only known bone is so unusual.2
Datuak nondik datozen
- Isfjordosaurus (en.wikipedia.org)
- Phylogeny, systematics, and origin of the Ichthyosauria, the state of the art (palaeodiversity.org)
- Isfjordosaurus in The Paleobiology Database (CC BY 4.0): adina, tokiak, arroka-formazioak, sailkapena.
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