Cretaceous chewing lice eggs provide insight into early coevolution with early bird hosts
Peer-Reviewed Publication
Updates every hour. Last Updated: 7-Jul-2025 15:10 ET (7-Jul-2025 19:10 GMT/UTC)
A recent study published in National Science Review reports the discovery of fossilized chewing lice eggs in mid-Cretaceous Burmese amber, offering the earliest direct evidence of parasitic lice feeding on feathers of early stem-group birds. The eggs, attached to enantiornithine feathers, reveal early host-parasite relationships during the Mesozoic. This finding supports the hypothesis that lice evolved parasitism in association with basal birds and provides insights into their early ecological specialization. The research enriches understanding of lice-host coevolution and highlights the role of ancient vertebrates in the evolutionary transition of lice from free-living ancestors to obligate parasites.