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[74] [8] Unlike ossified tendons, the cervical ribs of Tanystropheus are dense and fully ossified throughout the animal's lifetime, so its neck was even more inflexible than that of dinosaurs. [ 35 ] A pair of 2015 blog posts by paleoartist Mark Witton estimated that the neck made up only 20% of the entire animal's mass, due to its light and ...
EQ in birds (and estimated EQ in other dinosaurs) generally also falls below that of mammals, possibly due to lower thermoregulation and/or motor control demands. [39] Estimation of brain size in Archaeopteryx (one of the oldest known ancestors of birds), shows it had an EQ well above the reptilian range, and just below that of living birds.
Map showing the location of Panxian and Luoping during the Anisian (a), with stratigraphic position of Luoping Dinocephalosaurus (b). Subsequently, additional Dinocephalosaurus specimens were discovered from the slightly older Luoping locality, which has been dated to 245–244 million years old based on conodont biostratigraphy [7] as well as preliminary radiometric dating. [8]
This subspecies of the metallic pigeon is only known from a footnote in John Latham's General History of Birds and seems to have become extinct some time before 1800; possibly, however, the location is erroneous and the footnote really refers to the still-existing population on Fiji.
Example: Utahraptor hunting an Iguanodon, two animals which did not live together. Example: Dinosaurs from the Triassic or Jurassic depicted walking on grass, which did not exist at that time. Exception: Photographs of life-sized models taken in parks. It should be made clear in the caption that these are models.
1.17.5.3 Tribe Isolobodontini. 1.17.5.4 Tribe Hexolobodontini. 1.18 Family Heptaxodontidae. ... Rodents are animals that gnaw with two continuously growing incisors ...
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Permian–Triassic boundary at Frazer Beach in New South Wales, with the End Permian extinction event located just above the coal layer [2]. Approximately 251.9 million years ago, the Permian–Triassic (P–T, P–Tr) extinction event (PTME; also known as the Late Permian extinction event, [3] the Latest Permian extinction event, [4] the End-Permian extinction event, [5] [6] and colloquially ...