单词 | Eurypterida |
释义 | Eurypteridaplural noun Eu·rypter·i·da ˌyu̇rə̇(p)ˈterədə, -u̇rə̇(- : an order of extinct, usually large, aquatic arthropods that lived during the Paleozoic era, had a cephalothorax with six pairs of limbs of which the last pair were usually shaped like paddles and a tapering abdomen of 13 segments, and included the largest known arthropods, some exceeding 6 feet (1.8 meters) in length |
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