Ephemeroptera (Mayflies)

Question 1

Baetiscidae

Answer 1

• Large mesonotal shield

FFG: Collectors

Question 2

Caenidae

Answer 2

• Square operculate gills on the abdominal segment 2
• Notum fused for most of the wing pads
  FFG: Collectors

Question 3

Ephemeridae

Answer 3

• Mandibulate tusks that twist outward
• Long, filamentous gills
  FFG: Collectors

Question 4

Ephemerellidae

Answer 4

• Lamellate or operculate (plated) gills on segments 3-7, but never on 2
• Split notum between wing pads
  FFG: Collectors

Question 5

Heptageniidae

Answer 5

• Distictively flattened head and body
• Dorsal eyes
  FFG: Collectors/Grazers

Question 6

Isonychiidae

Answer 6

• Operculate (plated) gills
• Long fringe of setea on the inner margin of the foreleg, especially on the tibia (filter-collector of FPOM)
  FFG: Collectors

Question 7

Baetidae

Answer 7

• *The median caudal filament is shorter than the cerci

FFG: Collectors

Question 8

Leptophlebiidae

Answer 8

Double-forked or fingered “fleshy” gills on segments 2-6

FFG: Collectors

Question 9

Metroposidae

Answer 9

Biforcated tarsal claws; pisciformous body shape

FFG: Predators