Articles on Jaws

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Euphanerops, a primitive jawless fish from the World Heritage site at Miguasha, Quebec, which has now been found to have paired hind limb structures and copulatory sex organs. François Miville-Deschênes with permission

The origins of those sexual organs: a fishy tale much more primitive than we thought

Sexual organs similar to what we see in sharks and rays today appeared many millions of years ago in much more primitive ancient fishes than was previously thought.
Qilinyu, shown here front and top left, with its kin Entelognathus and small worm-like conodont animals swimming in the background. Dingua Yang/Inst. Vertebrate Palaeontology & Palaeoanthropology

Chew on this: we finally know how our jaws evolved

Next time you bite down on something you're eating, spare a thought for the evolutioniary leap made by an ancient fish that gave rise to our jaws.

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