Family: Tricorythidae

Little Stout Crawler Mayflies

These photos supplement pages 49-62 of the Guide to Aquatic Invertebrates of the Upper Midwest. Information on the biology of Tricorythidae can be found on page 62. Tricorythidae have triangular operculate gills that do not touch along the midline. Caenidae gills are square and nearly or absolutely touching along the midline. Click to compare with Caenidae

Tricorythidae

Tricorythidae gills

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