Metashastasaurus

O nome significa: “near Shastasaurus”1

Comía: CarneIctiosaurosTriásico SuperiorTecnicamente non é un dinosauro

Metashastasaurus was a huge marine reptile that swam in the oceans during the Late Triassic, about 227 to 205 million years ago. It was not a dinosaur, but a kind of ichthyosaur, with a body like a dolphin and a long snout. It lived in the seas near what is now British Columbia, Canada.1 2

Dato curioso: este réptil mariño nadaba mentres os dinosauros camiñaban por terra. Todo o mundo lles chama dinos, pero eran outra rama dos réptiles.

Viviu

hai entre 227 e 206 millóns de anos3

Triásico Superior

Fósiles atopados en

Fossils were found in the Pardonet Formation of British Columbia, Canada.2

Velocidade máxima

uns 46 km/h (29 mph)

Nadar, estimación

Cando viviu?

Triásico

Xurásico

Cretáceo

Hai 252 millóns de anos20114566, o asteroide

Que velocidade alcanzaba?

Unha persoa camiñando uns 5 km/h (3 mph)

Un neno en bici uns 12 km/h (7 mph)

Metashastasaurus uns 46 km/h (29 mph)

Un cabalo ao galope uns 65 km/h (40 mph)

Un guepardo uns 100 km/h (62 mph)

cousas xeniais

Datos curiosos

Metashastasaurus was first named in 2001 by scientists Nicholls and Manabe.1

Its skeleton is very similar to other shastasaurid ichthyosaurs, but its shoulder blade and fibula (a leg bone) are shaped differently.2

Its skull has large diamond-shaped frontals (bones on top of the head) that enter the supratemporal fenestrae, which are openings in the skull.2

It had four proximal carpals (wrist bones) and four digits in its front limb, showing that earlier reconstructions were based on incomplete material.2

Metashastasaurus lived in a marine environment and was nektonic, meaning it swam actively in the open water.1

It gave birth to live young, like other ichthyosaurs, rather than laying eggs.1

Imaxe de Metashastasaurus feita con IA — Unha imaxe feita con IA de como podería ser Metashastasaurus, creada por un ordenador a partir do que saben os científicos. É unha suposición: o animal real podía ser diferente, e ninguén sabe as súas cores de verdade.

Cazamitos

Mito: Some people think Metashastasaurus was a dinosaur because it lived in the same time as dinosaurs.

Verdade: Metashastasaurus was an ichthyosaur, a marine reptile, not a dinosaur. Ichthyosaurs lived in the sea and had fish-like bodies, while dinosaurs were land reptiles.1

Para expertos en dinos

Nome científico: Metashastasaurus
Bautizado por: Nicholls and Manabe 20013
Grupo: Ictiosauros
Familia / clado: Shastasauridae3
Clasificación: Ichthyosauria > Ichthyosauromorpha3
Idade das rochas: de 227 a 206 millóns de anos (Norian)3
Formacións rochosas: Pardonet3
Países: Canadá3
Rexistros fósiles: 2 na Paleobiology Database3
Descubrimento: Metashastasaurus was named by Nicholls and Manabe in 2001 after they studied new specimens from Pink Mountain, British Columbia. These specimens showed that the species previously called Shastasaurus neoscapularis was different enough to be placed in a new genus.2
Aínda en debate: Scientists are still debating whether the genus Shastasaurus is valid, because its type species is based on poor fossils. Metashastasaurus was created to help clarify this, but the relationships between these ichthyosaurs are still not fully settled.2

De onde veñen os datos

PBDB Taxon (paleobiodb.org)
A new genus of ichthyosaur from the Late Triassic... : Canadian Journal of Earth Sciences (ovid.com)
Metashastasaurus in The Paleobiology Database (CC BY 4.0): idade, lugares, formacións rochosas, clasificación.

Cada dato desta páxina ten un número que leva á súa fonte. Se nos equivocamos nalgo, sentímolo, somos fans dos dinos, non unha revista científica. Escríbenos a [email protected] e arranxámolo.

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