A research team led by Western Illinois University scientist Thomas Hegna has announced the discovery of two pyritized, egg-bearing specimens of the Ordovician trilobite Triarthrus eatoni. Left: ventrally preserved specimen of the Ordovician trilobite Triarthrus eatoni showing nine eggs in the specimen’s left genal angle; scale bar – 5 mm. Right: close up of the egg-bearing region from the specimen; scale bar – 2 mm (top); scanning electron...
