Planner graph on Loggerhead Turtle's carapace

The Loggerhead sea turtle or Caretta Caretta is the world's largest hard-shelled turtle. It's carapace contains five vertebral scutes running down the midline, while five pairs of costal scutes border them. The resulting planar graph due to this scalation is 3-regular 28 vertices and 42 edges.

Planner graph on Green Turtle's carapace

In graph theory, a planar graph is a graph that can be embedded in the plane, i.e., it can be drawn on the plane in such a way that its edges intersect only at their endpoints.

A graph is said to k-regular if all the vertices of the graph has dgree k.



The Green sea turtle or Chelonia mydas has a dorsoventrally flattened body. Its carapace is composed of five central scutes flanked by four pairs of lateral scutes. The resulting planner graph is 3-regular with 24 vertices and 36 edges.