Family: Isonychiidae

Brush-Legged Mayflies

These photos supplement pages 49-62 of the Guide to Aquatic Invertebrates of the Upper Midwest. Information on the biology of Isonychiidae can be found on page 59. Isonychiidae can be distinguished by the double row of long setae (hairs) on the foreleg as seen below. They also have long hairs along the caudal filaments and oval gills on segments 1-7.

Isonychiidae

Isonychiidae dorsal Isonychiidae leg

Ephemeroptera

BaetidaeBaetidae
Minnow Mayflies

Baetiscidae

Baetiscidae
Armored Mayflies

CaenidaeCaenidae
Square-Gill Mayflies
 

EphemerellidaeEphemerellidae
Spiny Crawler Mayflies
 

EphemeridaeEphemeridae
Burrowing Mayflies

HeptageniidaeHeptageniidae
Flathead Mayflies
 

IsonychiidaeIsonychiidae
Brush-Legged Mayflies

LeptophlebiidaeLeptophlebiidae
Prong-Gilled Mayflies

MetretopodidaeMetretopodidae
Cleft-Footed Mayflies

PolymitarcyidaePolymitarcyidae
Pale Burrowing Mayflies

PotamanthidaePotamanthidae
Hacklegill Mayflies

SiphlonuridaeSiphlonuridae
Primitive Minnow Mayflies

TricorythidaeTricorythidae
Stout Crawler Mayflies