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The researchers dismissed using a soapy texture to identify gastroliths as "unreliable". [11] Gastroliths tended to be universally dull, although the colors represented were varied including black, dark brown, purplish red and grey-blue. [11] Reflectance values greater than 50% are very diagnostic for identifying gastroliths. [11]
Gastroliths were generally either disc-shaped or spherical; the former would've come from beaches and the latter from river mouths. All were composed of chert, as is the case with several other species of plesiosaurs. It is hypothesized that chert stones are specifically sought out by plesiosaurs as gastroliths for their hardness and durability ...
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.
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 desert tortoise (Gopherus agassizii) is a species of tortoise in the family Testudinidae.The species is native to the Mojave and Sonoran Deserts of the southwestern United States and northwestern Mexico, and to the Sinaloan thornscrub of northwestern Mexico. [4]
Two potential specimens which were identified as cf. Wapuskanectes, TMP 2011.88.1 and TMP 2012.50.1, preserve gastroliths.The former's gastroliths were primarily composed of black, polished chert pebbles with some minor quartzites, and the latter's were likely the same, although only a few of its gastroliths were visible, the largest of which weighed 14.5 grams.
Holotype. Region with gastroliths in red (not visible). Gastroliths. Most of the skeleton is preserved, missing only the left forelimb and scapula, the bones distal to the ankle on the right hindlimb, and the proximal third of the cervical ribs on the left side, and the first few anterior dorsal ribs, also on the left side.
The specimen was associated with roughly 13.1 kg of gastroliths. The largest of these was 17 cm long and 1.4 kg in weight. Everhart would later compare its size to that of a softball and observe that not only was it one of the largest known plesiosaur gastroliths, but also one of the largest gastroliths from any animal. [37] November