WebAug 18, 2024 · More information: Yuzheng Ke et al, A large and unusually thick-shelled turtle egg with embryonic remains from the Upper Cretaceous of China, Proceedings of …
Turtle - Fossil history Britannica
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. It is known only from the Pierre Shale and has one species, A. ischyros. In the past, the … See more Research history The holotype specimen, YPM 3000, was collected from the Late Campanian-age Pierre Shale of South Dakota along the Cheyenne River in Custer County by American … See more Archelon was an obligate carnivore. The thick plastron indicates the animal probably spent a lot of time on the soft, muddy seafloor, likely a slow-moving bottom feeder. … See more • Stupendemys • Psephophorus • Atlantochelys • Largest prehistoric animals See more • Oceans of Kansas Paleontology See more The holotype measures 352 cm (11.5 ft) from head to tail, with the head measuring 60 cm (2 ft), the neck 72 cm (2.4 ft), the thoracic vertebrae 135 cm (4.4 ft), the sacrum 15 … See more Archelon inhabited the shallow Western Interior Seaway; the muddy, oxygen-depleted seafloor was probably, on average, no more than 180 m (600 ft) below the surface, and average water temperature may have been 17 °C (63 °F) in the Campanian. … See more • Hay, O. P. 1908. The fossil turtles of North America. Carnegie Institution of Washington, Publication No. 75, 568 pp, 113 pl. • Wieland, G. R. 1902. Notes on the Cretaceous turtles, Toxochelys and Archelon, with a classification of the marine … See more WebNov 15, 2005 · Sea turtles (Chelonioidea) are a prominent group of modern marine reptiles whose early history is poorly understood. Analysis of exceptionally well preserved fossils of Bouliachelys suteri gen. et sp. nov., a large-bodied basal protostegid (primitive chelonioid) from the Early Cretaceous (Albian) of Australia, indicates that early sea turtles were … homeless shelters in panama city
This Ancient Transylvanian Turtle Survived the Asteroid That ... - Newsweek
WebMar 11, 2024 · A newly described softshell turtle that lived in North Dakota 66.5 million years ago at the end of the Cretaceous Period, just before the end-Cretaceous mass extinction,is oneof the earliest known ... http://www.scistp.org/lifehistory/cretaceous.php WebCretaceous Period, in geologic time, the last of the three periods of the Mesozoic Era. The Cretaceous began 145.0 million years ago and ended 66 million years ago; it followed the Jurassic Period and was succeeded … homeless shelters in orange ca