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    • Heptagenioidea
  • (14)
Pink lady mayfly (Epeorus albertae) close up of eye of male, Madison River, Montana, USA, August.
01593633
Phil Savoie / Pink lady mayfly (Epeorus albertae) close up of eye of male, Madison River, Montana, USA, August.
Summer mayfly nymphs (Siphlonurus lacustris) and Flathead mayfly nymph (Electrogena sp.), underwater, Europe, June, controlled conditions
01608840
Jan Hamrsky / Summer mayfly nymphs (Siphlonurus lacustris) and Flathead mayfly nymph (Electrogena sp.), underwater, Europe, June, controlled conditions
Flathead mayfly nymph (Electrogena sp.) and Stonefly nymph (Isoperla sp.), underwater, Europe, June, controlled conditions
01608838
Jan Hamrsky / Flathead mayfly nymph (Electrogena sp.) and Stonefly nymph (Isoperla sp.), underwater, Europe, June, controlled conditions
Flathead mayfly nymph (Electrogena sp.), clinging at the bottom, Europe, June, controlled conditions
01608837
Jan Hamrsky / Flathead mayfly nymph (Electrogena sp.), clinging at the bottom, Europe, June, controlled conditions
Pink lady mayfly (Epeorus albertae) close up of eye of male, Madison River, Montana, USA, August.
01593632
Phil Savoie / Pink lady mayfly (Epeorus albertae) close up of eye of male, Madison River, Montana, USA, August.
Pink lady mayfly (Epeorus albertae) close up of eyes of male , Madison River, Montana, USA, August.
01593631
Phil Savoie / Pink lady mayfly (Epeorus albertae) close up of eyes of male , Madison River, Montana, USA, August.
March brown mayfly (Rhithrogena germanica), mayfly, River Usk, Wales, UK, May.
01593612
Phil Savoie / March brown mayfly (Rhithrogena germanica), mayfly, River Usk, Wales, UK, May.
Flathead mayfly nymph (Heptageniidae) Europe, April, controlled conditions.
01490692
Jan Hamrsky / Flathead mayfly nymph (Heptageniidae) Europe, April, controlled conditions.
Flathead mayfly nymph (Heptageniidae) Europe, April, controlled conditions.
01490691
Jan Hamrsky / Flathead mayfly nymph (Heptageniidae) Europe, April, controlled conditions.
Flat-headed mayfly (Ecdyonurus sp.) nymph, resting underwater, Humber Brook, Herefordshire Plateau, England, UK. October. Controlled conditions using microscopy.
01721606
Will Watson / Flat-headed mayfly (Ecdyonurus sp.) nymph, resting underwater, Humber Brook, Herefordshire Plateau, England, UK. October. Controlled conditions using microscopy.
Flat-headed mayfly (Ecdyonurus sp.) nymph, resting underwater, Humber Brook, Herefordshire Plateau, England, UK. October. Controlled conditions using microscopy.
01721605
Will Watson / Flat-headed mayfly (Ecdyonurus sp.) nymph, resting underwater, Humber Brook, Herefordshire Plateau, England, UK. October. Controlled conditions using microscopy.
Flatheaded mayfly (Maccaffertium sp.) nymph, portrait on white background, Pennsylvania, USA. April.
01719030
Doug Wechsler / Flatheaded mayfly (Maccaffertium sp.) nymph, portrait on white background, Pennsylvania, USA. April.