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high-crowned teeth; A rough, flattish occlusal surface adapted for crushing and grinding; Cementum both above and below the gingival line; Enamel which covers the entire length of the body and likewise extends past the gum line; The cementum and the enamel invaginate into the thick layer of dentin
It adapted to the grassland with a more cursorial body plan than more basal entelodonts like Archaeotherium, losing their dewclaws entirely, proximally fused metacarpals, and similar shoulder musculature to bison. [15] [17] The Agate Springs bonebed was a floodplain environment with wet and dry seasons.
The grit, not grass hypothesis is an evolutionary hypothesis that explains the evolution of high-crowned teeth, particularly in New World mammals. The hypothesis is that the ingestion of gritty soil is the primary driver of hypsodont tooth development, not the silica -rich composition of grass , as was previously thought.
The grasslands of the western plains were the core of the great bison belt. The grasslands consisted primarily of blue grama ( Bouteloua gracilis ) and buffalo grass ( Bouteloua dactyloides ). These grasses have deep and dense root structure and retain large amounts of water, making them well suited to survive dramatic environmental fluctuations.
Once home to free-roaming herds of bison and leaping pronghorn, the Great Plains is now a shadow of its former self, embodying the story of disappearing wilderness in North American grasslands.
A graminivore is a herbivorous animal that feeds primarily on grass, [1] specifically "true" grasses, plants of the family Poaceae (also known as Graminae). Graminivory is a form of grazing . These herbivorous animals have digestive systems that are adapted to digest large amounts of cellulose , which is abundant in fibrous plant matter and ...
Date/Time Thumbnail Dimensions User Comment; current: 16:15, 3 November 2011: 2,700 × 1,761 (1.32 MB): High Contrast: Reverted to version as of 04:05, 28 September 2005
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