The higher-level phylogeny of the arthropods continues to be a matter of debate and research. In 2008, researchers at Tufts University uncovered what they believe is the world's oldest known full-body impression of a primitive flying <answer>insect</answer>, a 300 million-year-old specimen from the Carboniferous period. The oldest definitive <answer>insect</answer> fossil is the Devonian Rhyniognatha hirsti, from the 396-million-year-old Rhynie chert. It may have superficially resembled a modern-day silverfish <answer>insect</answer>. This species already possessed dicondylic mandibles (two articulations in the mandible), a feature associated with winged <answer>insect</answer>s, suggesting that wings may already have evolved at this time. Thus, the first <answer>insect</answer>s probably appeared earlier, in the Silurian period.
A University discovered a primitive flying what?
insect