Mayfly : Ephemeroptera with Pronophlebia rediviva.
Well preserved complete mayfly with both wings folded in next to the body. Lying just in front of it are two young Craneflies.. Nice detail under magnification.
Eocene, Green River Formation, Parachute Creek Member.
'Raydome' locality, near Douglas pass, Garfiled County, Colorado, USA.
Mayfly : 0.8 cm long.
