It may be hard to see, but you seem to share a family resemblance with Entelognathus primordialis. The fish, which lived million years ago. The fish, named Entelognathus primordialis, was a cm-long placoderm – an extinct class of armor-plated fishes, the first known animals to. "Entelognathus primordialis is one of the earliest, and certainly the most primitive, fossil fish that has the same jawbones as modern bony fishes.
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Sometime in the past, the gnathostome family tree branched into two groups: Until recently, scientists assumed the common ancestor of gnathostomes was more similar to cartilaginous fish. This ancestor "would have looked something like a shark, devoid of armor and with a largely cartilaginous skull," said study leader Min Zhu, a paleontologist at the Institute of Vertebrate Paleontology and Paleoanthropology, in Beijing.
Its entelognathus primordialis were tiny and set inside large "bony goggles," the researchers report. News Corp Australia NetworkOctober 15, Illustration courtesy Brian ChooSource: Min Zhu et al.
It is possible that Chondrichthyes started with distinct jaws and then dispensed with them. But consider that the million-year-old, armor-plated fish is the earliest known creature to have what humans might recognize as a face, according to research published Wednesday in Entelognathus primordialis.
That's mostly due to its bony, modern jaw.
As USA Today reports: