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fossil sharksCNN Edition
•87% Informative
Fossil remains from limestone quarries in northeastern Mexico are finally giving researchers a clearer idea of the shark’s appearance.
The find also reveals where the genus, known as Ptychodus , sat on the shark evolutionary tree, and other previously unknown traits of this “long-standing enigma” The discovery also provides insight into the evolutionary history of sharks found today .
The largest species of Ptychodus reached a maximum length of 9.7 meters ( nearly 32 feet ) Previous estimates put it at 11.2 meters , but the revised size is still larger than modern apex shark predators.
A fossil revealing the complete side view of the shark measured nearly 1.5 meters ( about 5 feet ) in length, suggesting it was from a much smaller shark.
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