Currently, only seven species of sea turtles exist. Among them are two in the genus Lepidochelys: the olive ridley and the Kemp’s ridley. Despite being among the most common sea turtles in much of the Caribbean Sea and elsewhere, little is known about their history or evolution. The remains of a turtle shell recently found on Panama’s Caribbean coast represent the oldest fossil evidence of these turtles ever found.
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Source: Phys.org