Lichen mimesis in mid-Mesozoic lacewings

Area of Science:

• Paleontology
• Evolutionary Biology
• Entomology

Background:

• Mimicry and camouflage are crucial for animal survival.
• Lichens, ancient symbiotic organisms, are sometimes mimicked by modern animals.
• Fossil evidence for lichen mimicry in insects is scarce.

Purpose of the Study:

• To present the earliest fossil evidence of mimicry between an insect and a lichen.
• To document a specific mimetic relationship involving a fossil lacewing and a fossil lichen.
• To establish the antiquity of lichen-insect mimicry systems.

Main Methods:

• Identification and analysis of fossil insect and lichen specimens.
• Comparative analysis of structural similarities and measurements between the insect mimic and lichen model.
• Corroboration of the lichen affinity of the fossil model.

Main Results:

• Discovery of the earliest fossil evidence of lichen mimicry.
• Identification of a novel moth lacewing mimic, Lichenipolystoechotes, and its lichen model, Daohugouthallus ciliiferus.
• Demonstration of structural similarities supporting the mimetic relationship.

Conclusions:

• Lichen-insect mimicry was established in the mid-Mesozoic era, predating modern associations by 165 million years.
• This ancient mimicry provided lacewings with effective survival strategies against predators.
• The fossil record reveals a longer history of complex ecological interactions than previously known.