The oldest or most ancient insect (bug) known today is called Rhyniognatha hirsti. It was found fossilized in red sandstone in Aberdeen,
Anatomical characteristics of the
fossil's jaw identify it as a true insect.
Although it share features with winged insects, it
is impossible to confirm that indeed it could fly
since the wings themselves are missing from the
fossil. The fossil suggests that insects were
among the earliest animals to live on land and
that winged flight may have evolved in the
Silurian Period, some 438-408 million years ago.
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