Proganochelys quenstedi

References

Images

Diagram illustrating the evolutionary stages of turtle shell development, showing skeletal outlines of Eunotosaurus, Pappochelys, Odontochelys, and Proganochelys with red highlighting the expanding shell area over time. Below, side-by-side illustrations compare the body structure and stride length of early reptiles with flexible spines and fast crawling to Eunotosaurus and later turtles with rigid spines and slower movement.

Proganochelys quenstedi

fossil turtle

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turtle
Origin and evolution
A slightly younger fossil species, Proganochelys quenstedi, also had teeth, but the teeth were located on the roof of the mouth, not on the upper or lower jaw. In contrast to Odontochelys, the shell of Proganochelys possessed most of the features of modern turtles, and it completely encased the shoulder…
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A slightly younger fossil species, Proganochelys quenstedi, also had teeth, but the teeth were located on the roof of the mouth, not on the upper or lower jaw. In contrast to Odontochelys, the shell of Proganochelys possessed most of the features of modern turtles, and it completely encased the shoulder…
Read More