单词 | Litopterna |
释义 | Litopterna [´lid·ǝp`tǝr·nǝ] PALEONTOLOGY An order of hoofed, herbivorous mammals confined to the Cenozoic of South America; characterized by a skull without expansion of the temporal or squamosal sinuses, a postorbital bar, primitive dentition, and feet that were three-toed or reduced to a single digit. |
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