Paleontologists have discovered an extraordinary fossil shark in Mexico. It is Aquilolamna millrace, a Late Cretaceous shark that was wider than it was long, with an oddly slender pair of pectoral fins. This shark, far from a ferocious biter, may have survived by eating plankton. The researchers published it in Science.
Romain Vullo, a paleontologist at the University of Rennes in France and lead author of the paper said that this variety is definitely a shark and there is confusion about that. He also added that this family of sharks became extinct at the end of the Cretaceous without descendants. He also described the shark as a languid predator. After propelling itself, Aquilolamna millrace would have used those remarkable pectoral fins to do the marine equivalent of hang-gliding, coasting through the seas and, perhaps, gobbling up plankton that got in its way.
Kenshu Shimada, a professor of paleobiology at DePaul University in Chicago and an expert in ancient shark species was excited about this discovery. “The exact taxonomic identity of this new shark is still questionable, but its body design, particularly its exceptionally elongated paired pectoral fins, is unique not only within the shark order Lamniformes but also in the entire shark world. The shark can be planktivorous.