TestudinesyoudaoicibaDictYouDict[Testudines 词源字典]
"An order of reptiles which comprises the turtles, terrapins, and tortoises. They are distinguished by having a shell of bony plates covered with horny scales, and many kinds are aquatic", Modern Latin (plural), based on Latin testa 'shell'.[Testudines etymology, Testudines origin, 英语词源]