1. Ephemeroptera
Mayflies

2. Order: Ephemeroptera Suborder: Shistonote Family: Baetidae
Genus: Baetis
Shorter middle cerci
Long Antennae
Split Back
A. Bosak BMIC

3. Family: Leptophlebiidae
Order: Ephemeroptera
Suborder: Shistonote
Family: Leptophlebiidae
Paraleptophlebia
Abdominal gills
A. Bosak BMIC
A. Bosak BMIC
A. Bosak BMIC
Leptophlebia
Abdominal gills
A. Bosak BMIC
A. Bosak BMIC

4. Rounded frontal process
Order: Ephemeroptera Family: Ephemeridae Genus: Hexagenia
A. Bosak BMIC
Tusks point upward
A. Bosak BMIC
Rounded frontal process
A. Bosak BMIC

5. Order: Ephemeroptera Suborder: Shistonote Family: Heptageniidae Genus: Stenonema
Flat spoon-shaped head
A. Bosak BMIC
A. Bosak BMIC
Reduced gills
A. Bosak BMIC
Rounded gills

6. Order: Ephemeroptera Suborder: Pannote Family: Caenidae Genus: Caenis
Close up of gill opercula
Fused wing pads
Square, overlapping operculate gills
A. Bosak BMIC
A. Bosak BMIC
Close up of gill opercula
A. Bosak BMIC

7. Fused notum covers much of abdomen
Order: Ephemeroptera Suborder: Pannote Family: Baetiscidae Genus: Baetisca
A. Bosak BMIC
Fused notum covers much of abdomen