The ancient shark was found in China and is humans' oldest jawed ancestor. The apex predators of the ocean are often shown as living sharks. Paleontologists have been able to locate remains of ancient ancestors that originate from the Palaeozoic era, which dates back hundreds of millions of years
revealed that the species is anatomically close to groups of extinct spiny “sharks” collectively known as acanthodians. Unlike modern sharks, acanthodians have skin ossifications of the shoulder region that occur primitively in jawed fish.Fanjingshania
These discoveries provide verifiable proof that major vertebrate groupings began to diversify tens of millions of years before the 420 million-year-old start of the so-called “Age of Fishes”from every other known vertebrate. It has pectoral, pre-pectoral, and pre-pelvic spines that fuse together as a single unit with dermal shoulder girdle plates. Furthermore, it was found that the shoulder plates’ ventral and lateral portions extend to the pectoral fin spines’ posterior edge.
The Chongqing fish fossil depository is the world’s only early Silurian Lagerstätte which preserves complete, head-to-tail jawed fishes, providing a peerless chance to peek into the proliferating “dawn of fishes”. Credit: NICE Tech/ScienceApe
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