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A gastrolith, also called a stomach stone or gizzard stone, is a rock held inside a gastrointestinal tract. Gastroliths in some species are retained in the muscular gizzard and used to grind food in animals lacking suitable grinding teeth. In other species the rocks are ingested and pass through the digestive system and are frequently replaced.
Gizzard of a chicken. The gizzard, also referred to as the ventriculus, gastric mill, and gigerium, is an organ found in the digestive tract of some animals, including archosaurs (birds and other dinosaurs, crocodiles, alligators, pterosaurs), earthworms, some gastropods, some fish, and some crustaceans.
Mallon and Anderson postulated that Ankylosaurs and Ceratopsids may have partitioned the herb layer in the Dinosaur Park Formation, or that Ceratopsid feeding height was slightly higher. [21] As well as suggesting that the Ornithopods might have made room for the passing Ceratopsid herds by rising up to avoid ecological competition.
An asteroid struck Earth 66 million years ago, triggering a horrific mass extinction. New research that relied heavily on fossilized feces and vomit - evidence of who is eating what and who is ...
Mounted skeletons of different age groups, Los Angeles Natural History Museum. The feeding behaviour of Tyrannosaurus rex has been studied extensively. The well known attributes of T. rex (its jaws, legs and overall body design) are often interpreted to be indicative of either a predatory or scavenging lifestyle, and as such the biomechanics, feeding strategies and diet of Tyrannosaurus have ...
A large coprolite of a carnivorous dinosaur found in Harding County, South Dakota, US A large Miocene coprolite from South Carolina, US Coprolites found on the Blahnita riverbed, Romania, showing a seed inclusion (right specimen) A large coprolite from South Carolina, US Age: White River Oligocene; Location: Northwest Nebraska; Dimensions: Varies (25 mm × 20 mm); Weight: 8-10 g; Features ...
The latest dinosaur being mounted at the Natural History Museum in Los Angeles is not only a member of a new species — it's also the only one found on the planet whose bones are green, according ...
Prehistoric humans in Brazil carved drawings in the rock next to dinosaur footprints, suggesting they may have found them meaningful or interesting, a study found.