The evolutionary history of sharks and rays has been illuminated by a recently constructed phylogenetic tree. A recent study by an international team of researchers, led by palaeobiologist Patrick L. Jambura from the University of Vienna's Department of Palaeontology, has revealed that cartilaginou
carried features that are found in both sharks and rays today,” explains study author Patrick L. Jambura.lived some 150 million years ago and was a 1.5-m-long, dorso-ventrally flattened cartilaginous fish with expanded pectoral fins and a prominent fin spine in front of each dorsal fin.
Even though cartilaginous fishes as a group have survived to this day, most species disappeared during their evolution, including
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