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Martinectes

Naam beteken: “Martin's swimmer”1

Het geëet: VleisPlesiosourusseLaat KrytTegnies nie 'n dinosourus nie

Martinectes was a small, fast-swimming marine reptile that lived in the shallow seas of North America during the time of the dinosaurs. It had a short neck, a long snout, and four big flippers that helped it chase after fish and squid.1

Prettige feit: hierdie seereptiel het geswem terwyl dinosourusse op land geloop het. Almal noem hulle dino's, maar hulle was 'n ander tak van die reptiele.

Het geleef

84 tot 72 miljoen jaar gelede3

Laat Kryt

Fossiele gevind in

South Dakota, Texas, and Wyoming, USA3

Lengte

2,3 tot 2,6 m (7,5 tot 8,5 ft)1

Gewig

1,27 ton (2 800 lb)2

Topspoed

omtrent 26 km/h (16 mph)

Swem, skatting

Wanneer het dit geleef?

Trias

Jura

Kryt

252 miljoen jaar gelede20114566, die asteroïde

Hoe groot was dit?

Hoe lank was dit?

Hoe swaar was dit?

so swaar soos 64 honde

so lank soos 2,5 honde van neus tot stertso lank soos 14 piesangs punt aan puntso swaar soos 250 waatlemoeneso swaar soos 67 kleuterskoolkindersso swaar soos 40 skoolkindersso swaar soos 3 ysberekon die lengte van 'n groot swembad (50 m) in 6,9 sekondes swem

Hoe groot was Martinectes vergeleke met JOU?

Net wiskunde in jou blaaier. Niks word gestoor of êrens heen gestuur nie.

Hoe vinnig was dit?

'n Mens wat loop omtrent 5 km/h (3 mph)

'n Kind op 'n fiets omtrent 12 km/h (7 mph)

Martinectes omtrent 26 km/h (16 mph)

'n Galopperende perd omtrent 65 km/h (40 mph)

'n Jagluiperd omtrent 100 km/h (62 mph)

cool goed

Prettige feite

Martinectes was one of the smallest adult polycotylid plesiosaurs ever found, measuring only about 2.3 to 2.6 metres long.1

It had large eyes with a bony ledge above them, which may have shaded its eyes from sunlight while hunting near the water's surface.1

Martinectes lived about 80 million years ago in the Western Interior Seaway, a huge ocean that split North America in two.1

Its name means 'Martin's swimmer', honoring the person who helped discover its fossils.1

Martinectes was originally thought to be a species of Dolichorhynchops, but scientists gave it its own genus in 2024.1

It had unusually wide bones in its spine and a very short back part of its skull, which helped scientists tell it apart from other plesiosaurs.1

KI-prent van Martinectes — 'n KI-prent van hoe Martinectes dalk gelyk het, deur 'n rekenaar gemaak uit wat wetenskaplikes weet. Dit is 'n raaiskoot: die regte dier het dalk anders gelyk, en niemand weet wat sy regte kleure was nie.

julle het gevra

Mees gevraagde vrae oor Martinectes

?How big was Martinectes?

Martinectes was a large polycotylid plesiosaur, measuring at least around 5 metres (16 ft) long. Some estimates suggest it could reach up to 6 to 7 metres (20 to 23 ft), while a 2026 estimate put it at about 4.95 metres (16.2 ft) long.2

?Was Martinectes a dinosaur?

No, Martinectes was a plesiosaur, a marine reptile that lived in the seas during the time of the dinosaurs. It was not a dinosaur.2

?What did Martinectes eat?

Martinectes likely chased after fish and squid, using its long snout and four big flippers to swim fast. Its small teeth and narrow jaws suggest it ate small, slippery prey.2

Vir dino-kenners

Wetenskaplike naam: Martinectes
Benoem deur: Clark et al. 20243
Groep: Plesiosourusse
Familie / klade: Polycotylidae3
Klassifikasie: Plesiosauria > Sauropterygia3
Ouderdom van die rotse: 84 tot 72 miljoen jaar (Campanian)3
Rotsformasies: Pierre Shale, Taylor Marl3
Lande: VSA3
Fossielrekords: 3 in The Paleobiology Database3
Ontdekking: Martinectes was named in 2024 by Robert O. Clark, F. Robin O'Keefe, and Sara E. Slack. They studied fossils that had been found in Wyoming and South Dakota, USA, and realized they belonged to a new genus.3 1
Steeds omstrede: Scientists are still debating exactly how Martinectes used its unusual eye ledges and wide skull for hunting.1

Waar die feite vandaan kom

A new genus of small polycotylid plesiosaur from the Upper Cretaceous of the Western Interior Seaway and a clarification of the genus Dolichorhynchops (sciencedirect.com)
Martinectes (en.wikipedia.org)
Martinectes in The Paleobiology Database (CC BY 4.0): ouderdom, plekke, rotsformasies, klassifikasie.

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