. The dinosaur book : the ruling reptiles and their relatives. Dinosaurs; Reptiles, Fossil. Cryptodira The other, the Cryptodira or vertical-neck turtles, is of broad distribution The first true turtles are found in the Triassic period (between 155 and 200 million years ago), in the group known as the Amphichelydia. Amphichelydia All our modern turtles evidently descended from the group of animals represented here by Eunotosaurus. Its ribs were greatly broadened to form the beginnings of the upper shell. The ver- tebrae were reduced and transformed somewhat as in turtles. Please note that thes
. The dinosaur book : the ruling reptiles and their relatives. Dinosaurs; Reptiles, Fossil. Cryptodira The other, the Cryptodira or vertical-neck turtles, is of broad distribution The first true turtles are found in the Triassic period (between 155 and 200 million years ago), in the group known as the Amphichelydia. Amphichelydia All our modern turtles evidently descended from the group of animals represented here by Eunotosaurus. Its ribs were greatly broadened to form the beginnings of the upper shell. The ver- tebrae were reduced and transformed somewhat as in turtles. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Colbert, Edwin H. (Edwin Harris), 1905-2001; Knight, Charles Robert, 1874-1953; American Museum of Natural History. New York : Published for the American Museum of Natural History by McGraw-Hill
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Keywords: ., bookauthoramericanmu, bookcentury1900, booksubjectreptilesfossil
