Fresnosaurus

Izenaren esanahia: “Fresno lizard, named after Fresno County in California”1

Jaten zuen: HaragiaPlesiosauroakGoi KretazeoaTeknikoki ez da dinosauroa

Fresnosaurus was a huge swimming reptile with a very long neck and flippers instead of legs. It lived in the sea near California during the time of the dinosaurs, but it was not a dinosaur. It probably used its long neck to sneak up on fish and other small sea creatures.1 3

Datu dibertigarria: itsas narrasti hau igerian zebilen dinosauroak lehorrean ibiltzen ziren bitartean. Denek dino deitzen diete, baina narrastien beste adar bat ziren.

Bizi izan zen

Duela 72 eta 66 milioi urte artean3

Goi Kretazeoa

Fosilak hemen aurkitu dira:

Fresno County, California, USA, in the Moreno Formation1 2

Luzera

9 m arte (30 ft)1

Abiadura maximoa

23 km/h inguru (14 mph)

Igeri egitea, kalkulua

Noiz bizi izan zen?

Triasikoa

Jurasikoa

Kretazeoa

Duela 252 milioi urte20114566, asteroidea

Zein handia zen?

Zein luzea zen?

ilaran aparkatutako 2 auto bezain luzebata bestearen atzean jarritako 50 banana bezain luzeigerileku handi baten luzera (50 m) 7,8 segundotan egin zezakeen igerian

Zein handia zen Fresnosaurus 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)

Fresnosaurus 23 km/h inguru (14 mph)

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

Gepardo bat 100 km/h inguru (62 mph)

gauza bikainak

Datu dibertigarriak

Fresnosaurus lived about 70 to 66 million years ago, right at the end of the Age of Dinosaurs.1

The only known fossil is from a young animal, so scientists think adults might have been even bigger than 9 meters (30 feet).2

Its name honors Fresno County, and the species name 'drescheri' honors Arthur Drescher, who likely helped find the fossil.1

Fresnosaurus belonged to a group called elasmosaurids, famous for their extremely long necks and paddle-like flippers.1 3

The fossil includes bones like the coracoids (shoulder bones), humerus (upper arm bone), pelvic girdle, and femora (thigh bones), but no skull has been found.2

Scientists recently found that some extra bones labeled as Fresnosaurus might actually belong to a different, related plesiosaur called an aristonectine.2

Fresnosaurus: AAk egindako irudia — Fresnosaurus 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.

Mito-hauslea

Mitoa: Some people think Fresnosaurus was a dinosaur because it lived with dinosaurs and is often shown in dinosaur books.

Egia: Fresnosaurus was a plesiosaur, a marine reptile, not a dinosaur. Dinosaurs lived on land and had different body shapes.1 3

Dino adituentzat

Izen zientifikoa: Fresnosaurus
Izendatzailea:: Welles 19433
Taldea: Plesiosauroak
Familia / klada: Elasmosauridae3
Sailkapena: Plesiosauria > Elasmosauridae > Sauropterygia3
Arroken adina: 72 eta 66 milioi urte artean (Maastrichtian)3
Arroka-formazioak: Moreno3
Herrialdeak: AEB3
Fosil-erregistroak: 1 The Paleobiology Database datu-basean3
Aurkikuntza: Fresnosaurus was first described by Samuel Paul Welles in 1943, based on a fossil found in the Moreno Formation of California. The fossil was originally stored at the California Institute of Technology and is now at the Natural History Museum of Los Angeles County.1 2
Oraindik eztabaidagai: Scientists are still debating whether Fresnosaurus is a valid, separate genus or if it might be the same as another elasmosaurid, because the only fossil is incomplete and from a juvenile.2

Datuak nondik datozen

Fresnosaurus (en.wikipedia.org)
Reappraisal of Fresnosaurus drescheri (Plesiosauria; Elasmosauridae) from the Maastrichtian Moreno Formation, California, USA - ScienceDirect (sciencedirect.com)
Fresnosaurus in The Paleobiology Database (CC BY 4.0): adina, tokiak, arroka-formazioak, sailkapena.

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