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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.
British fossil hunter Mary Anning noticed as early as 1824 that "bezoar stones" were often found in the abdominal region of ichthyosaur skeletons found in the Lias formation at Lyme Regis. [7] She also noted that if such stones were broken open they often contained fossilized fish bones and scales as well as sometimes bones from smaller ...
At least two specimens of Pterodaustro have been found, MIC V263 and MIC V243, with gizzard stones in the stomach cavity, the first ever reported for any pterosaur. These clusters of small stones with angled edges support the idea that Pterodaustro ate mainly small, hard-shelled aquatic crustaceans using filter-feeding. Such invertebrates are ...
There, visitors can view pieces like the largest fossilized poo by a carnivorous animal, which measures 67.5 centimeters (26.6 inches) by 15.7 centimeters (6.2 inches) and likely came from a ...
In 2002, a study looked at 2 fossil skulls of large canids dated at 16,945 years before present (YBP) that had been found buried 2 metres and 7 metres from what was once a mammoth-bone hut at the Upper Paleolithic site of Eliseevichi-1 in the Bryansk region of central Russia, and using an accepted morphologically based definition of domestication declared them to be "Ice Age dogs". [5]
Scientists discovered a 520-million-year-old fossilized larva with brains and guts intact, ... typical dinosaur fossils are bones turned to stone and preserved from the passage of time located, if ...
A bezoar stone (/ ˈ b i z ɔː r / BEE-zor) is a mass often found trapped in the gastrointestinal system, [2] though it can occur in other locations. [3] [4] A pseudobezoar is an indigestible object introduced intentionally into the digestive system. [5] There are several varieties of bezoar, some of which have inorganic constituents and ...
A rare fossil discovery marks the first time a tyrannosaur’s stomach contents have been found, a new study says. The young apex predator was a cousin of T. rex. ... AP Week in Pictures: Latin ...