linguistic:voice_change
Fossil history

The oldest known fossil of the Lampyridae family is Protoluciola from the Late Cretaceous (Cenomanian ~ 99 million years ago) Burmese amber of Myanmar, which belongs to the subfamily Luciolinae. The light producing organ is clearly present. The ancestral glow colour for the last common ancestor of all living fireflies has been inferred to be green, based on genomic analysis.