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From Fins to Wings
NOVEMBER 2006
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Apalone spinifera, photographed at North Carolina State Museum of Natural Sciences
 8 of 21 
Spiny Softshell Turtle
Photograph by Rosamond Purcell
Animals as dissimilar as a squirrel monkey and softshell turtles start out more alike than they might appear. But, says biologist Sean Carroll, "the turtle screams novelty because of its obvious adaptations—the flippers, the shell. But the animals share the same basic architecture, are built along the same plan. They're variations on a theme."
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