2019年6月7日 · Pictures and detailed profiles of over a dozen prehistoric turtles of the Mesozoic and Cenozoic Eras, ranging from Allaeochelys to Stupendemys.

Prehistoric turtles. This category has the following 9 subcategories, out of 9 total. The following 9 pages are in this category, out of 9 total. This list may not reflect recent changes.

Archelon is an extinct marine turtle from the Late Cretaceous, and is the largest turtle ever to have been documented, with the biggest specimen measuring 4.6 m (15 ft) from head to tail and 2.2–3.2 t (2.4–3.5 short tons) in body mass.

2019年1月12日 · By the early Jurassic period, about 200 million years ago, prehistoric turtles and tortoises were pretty much locked into their modern body plans, though there was still room for innovation. The most notable turtles of the Cretaceous period were a pair of marine giants, Archelon and Protostega, both measuring about 10 feet long from head to ...

2024年4月3日 · But which turtles were the largest to ever walk or swim the Earth, large enough to resist the attacks of fierce Cretaceous predators? Here are a few that put our modern-day leatherbacks and Galapagos tortoises to shame.

2022年12月20日 · The turtles that existed eons ago were so much bigger than the ones that currently exist, and they fell into different species as there were several types of these huge turtles. This article will discuss some of these huge turtles and random facts about them.

Odontochelys semitestacea (meaning "toothed turtle with a half-shell") is a Late Triassic relative of turtles [1]. Before Pappochelys was discovered and Eunotosaurus was redescribed, [2] Odontochelys was considered the oldest undisputed member of Pantestudines (i.e. a stem-turtle).

2024年12月27日 · Archelon was a giant prehistoric turtle that lived during the Late Cretaceous period, around 80 to 66 million years ago. This sea turtle is the largest known turtle species to have ever existed. Let’s look at how Archelon fossils have provided incredible insights into its life and environment!

2025年1月11日 · Many of the oldest and most primitive forms lacked a shell, plastron, and a carapace. The oldest sea turtle is known from the mid-Cretaceous. Although Odontochelys, Proganochelys, and Eunotosaurus offer insight into early …

These ancient marine giants inhabited the oceans during the Cretaceous period, showcasing the impressive diversity and adaptations of prehistoric turtles. On land, turtles such as Meiolania developed heavily armored shells with defensive adaptations like spikes and horns.