Lepidopterous — Insect

: The Silkworm Moth ( Bombyx mori ) is legendary for its cocoon; it takes approximately 2,000 of these cocoons to produce just one pound of silk.

: Fossil evidence shows that lepidopterous insects have been around since at least the Jurassic period, with some evidence suggesting they may even date back to the Triassic. lepidopterous insect

Often considered a "bridge" between the two, with stocky bodies and hooked antennae tips. LEPIDOPTEROUS Definition & Meaning - Dictionary.com : The Silkworm Moth ( Bombyx mori )