hypsodont


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hypsodont

[′hip·sə‚dänt]
(vertebrate zoology)
Of teeth, having crowns that are high or deep and roots that are short.
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Molars hypsodont with large accessory columns and rugose enamel (Colbert, 1935).
Time-series methods are often applied to hypsodont dentition because the teeth grow in sequentially mineralized layers and are large enough to allow for collecting multiple samples along one or more of the lateral surfaces (Brown et al., 1960; Fricke and O'Neil, 1996; Gadbury et al, 2000).
The studied specimens show all the basic features of Pachyportax that the upper molars are strongly hypsodont, quadrate, having entostyle extended transversely, relatively strong styles and ribs.
Open grassy areas did exist in the vicinity, as attested by the presence of hypsodont rodents (Diamantomys) (Lavocat, 1973), macroscelidids (Myohyrax) (Butler, 1962, 1978a) and rhinocerotids (Ougandatherium) (Guerin and Pickford, 2003).
(54) Molar Hypsodonty: 0 = brachydont, 1 = weakly hypsodont, 2 = highly hypsodont.
6C-D) is an incomplete cheek tooth that has a crown length of at least 50 mm and is very hypsodont (crown height exceeds 136 mm).
Kurten & Anderson (1980) stated that "the hypsodont teeth were adapted to chew coarse vegetation, and the dentition suggests browsing habits." Its distinction as a browser stems largely from its pronounced premolar and molar bilophodonty.
The hypsodont molars of the lower jaws often fall out of the alveoli, but the splayed roots of the p4 and the long arc of the incisor commonly permit those teeth of Perognathus and Chaetodipus to stay in place.
These vegetational shifts are correlated with the rise in South America of mammals with hypsodont teeth adapted to grazing (Stebbins, 1981).
Consider the hypothesis that the high-crowned (hypsodont) cheek teeth of some herbivorous mammals are an adaptation to withstand the high levels of tooth wear caused by a grazing diet (Simpson 1944; Fortelius 1985).