ENTO 4484: Aquatic Entomology Lab Practical 2 (Ephemeroptera and Plecoptera Section)

NO branched gills

Elongate body

Distinctive color patterns on dorsal surface

Divergent wing pads

Cerci as long or longer than abdomen

Perlolidae (Plecoptera)

NO branched gills

Elongate body

Distinctive color patterns on dorsal surface

Divergent wing pads

Cerci as long or longer than abdomen

Perlolidae (Plecoptera)

Branched gills on thorax (behind base of legs)

Robust body

Distinctive patterns on dorsal surface

Perlidae (Plecoptera)

Branched gills on thorax (behind base of legs)

Robust body

Distinctive patterns on dorsal surface

Perlidae (Plecoptera)

Branched gills on thorax (behind base of legs)

Robust body

Distinctive patterns on dorsal surface

Perlidae (Plecoptera)

Gills on neck between head and thorax

Small and brown and hairy

Divergent wing pads

Nemouridae (Plecoptera)

Gills on neck between head and thorax

Small and brown and hairy

Divergent wing pads

Nemouridae (Plecoptera)

No gills

Long slender body (and small)

Meso wing pads further spread out than meta wing pads

Abdominal segments separated by membranous fold

Leuctridae (Plecoptera)

NO gills

Small slender body

Wing pads parallel

Short cerci

Chloroperlidae (Plecoptera)

No gills

Small slender body

Parallel wing pads

Short cerci

Chloroperlidae (Plecoptera)

Gills on abdominal segments 2-5 usually plate like, with basal gill tufts or flaps

Usually mottled yellow pattern

Very flat heads with horizontal orientation

Very flat bodies with outspread legs

Heptageniidae (Ephemeroptera)

Gills on abdominal segments 2-5 usually plate like, with basal gill tufts or flaps

Usually mottled yellow pattern

Very flat heads with horizontal orientation

Very flat bodies with outspread legs

Heptageniidae

Gills on abdominal segments 2-5 usually plate like, with basal gill tufts or flaps

Usually mottled yellow pattern

Very flat heads with horizontal orientation

Very flat bodies with outspread legs

Heptageniidae

Forked filamentous gills on segments 2-5 in tufts

• fringed margins

• double lamellae ending in filaments or points

Legs splayed out to the side

Leptophlebiidae

Forked filamentous gills on segments 2-5 in tufts

• fringed margins

• double lamellae ending in filaments or points

Legs splayed out to the side

Leptophlebiidae

Plate-like gills with fibrils shorter than gill plates

Large, minnow like

Vertically oriented head (legs also under body)

Double row of long setae on inner margins of femora and tibia of forelegs

Yellow stripe down back

Isonychiidae

Plate-like gills with fibrils shorter than gill plates

Large, minnow like

Vertically oriented head (legs also under body)

Double row of long setae on inner margins of femora and tibia of forelegs

Yellow stripe down back

Isonychiidae

Oval or heart shaped gills on abdominal segments

Very small, minnow-like body

Vertically oriented head

Long antennae

2-3 tails

(Rule all else out)

Baetidae (Ephemeroptera)

Oval or heart shaped gills on abdominal segments

Very small, minnow-like body

Vertically oriented head

Long antennae

2-3 tails

(Rule all else out)

Baetidae (Ephemeroptera)

Square-shaped gills on abdominal segment 2

• inner edges of gills meet or almost meet medially

Robust thorax, notum fused between forewings for at least half length of pads

Caenidae

Square-shaped gills on abdominal segment 2

• inner edges of gills meet or almost meet medially

Robust thorax, notum fused between forewings for at least half length of pads

Caenidae

Square-shaped gills on abdominal segment 2

• inner edges of gills meet or almost meet medially

Robust thorax, notum fused between forewings for at least half length of pads

Caenidae

Gills absent on abdominal segment 2

2 layered gills: top oval layer, and multi-lobed plate-like bottom layer (spiny)

Medium size, flattened

Ephemerellidae

Gills absent on abdominal segment 2

2 layered gills: top oval layer, and multi-lobed plate-like bottom layer (spiny)

Medium size, flattened

Ephemerellidae

Highly branched gills on cervix, thorax, and abdomen

Very large

Large pronotum that projects at corners

Pteronarcyidae (Plecoptera)

Forked gills with fringed margins

Dorsal gills

Large tusks

Fossorial digging legs

Ephemeridae