Plecia pealei

Plecia pealei is recognised by its delicate wing structure, clearly defined body segments, and visible antennae - features that make Green River insect fossils so highly sought after. The fine-grained limestone matrix of the formation allows for exceptional preservation, capturing intricate anatomical detail rarely seen in fossil insects.

Green River Formation
Wyoming, USA
Eocene
50 million years old

Matrix measures approximately 4.5cm x 4cm x 1cm