Testudinata n. pl. (Zool.) An order of reptiles which includes the turtles and tortoises. The body is covered by a shell consisting of an upper or dorsal shell, called the carapace, and a lower or ventral shell, called the plastron, each of which consists of several plates.
... than many people we wot of, in the fact that he knows when to keep his head in his shell. No sooner did we just now appear on the edge of the wood than this animal of the order Testudinata modestly withdrew. He knew he was no match for us. But how many of the human race are in the habit of projecting their heads into things for which they have no fittedness! They thrust themselves into discussions where they are almost sure to get trod on. They will dispute about ... — Around The Tea-Table • T. De Witt Talmage
... The systematics and ecology of the Sternothaerus carinatus complex (Testudinata, Chelydridae). Tulane Stud. ... — Description of a New Softshell Turtle From the Southeastern United States • Robert G. Webb