Aquatic Entomology Families

Ephemeroptera Ameletidae

Combtooth minnow mayflies

• lamellate gills

• comb-like maxillary palp

• notched labrum

Ephemeroptera Baetidae

Minnow mayflies

• no comb-like maxillary palp

• notched labrum

• antennae twice as long as head width

Ephemeroptera Baetiscidae

Armored mayflies

• carapace covers thorax, abdomen

Ephemeroptera Caenidae

Square gilled mayflies

• operculate gills are square

Ephemeroptera Ephemeridae

Burrowing mayflies

• fossorial legs

• dense abdominal gills

• tusks

Ephemeroptera Ephemerellidae

Spiny crawlers

• tubercles and/or spines present

• spines on femur, enlarged

Ephemeroptera Heptageniidae

Flatheaded Mayflies

• Very flat

• ALL of eye is visible dorsally

• one genus has 2 tails

Ephemeroptera Isonychiidae

Brushlegged mayflies

• Swimmers

• Hairy legs, hairy mouthparts

Ephemeroptera Leptophlebiidae

Prong-gilled mayflies

• Pronged or forked gills

• Gills are very fragile

Odonata Aeshnidae

Darner Dragonflies

• streamlined

• bristle-like antennae

• reduced cerci

• flat prementum/palpal lobes

Odonata Cordulegastridae

Biddies, Spiketails

• jagged palpal teeth

• often hairy and dirty

Odonata Corduliidae

Green eyed skimmers

• spoon shaped labrum w/ groove

• cerci more than half as long as paraproct

• Premental groove goes halfway

Odonata Libellulidae

Common skimmers

• cerci usually less than half of paraproct

• labrum covers face from front view

• spoon shaped labrum

• small teeth on palpal lobes

Odonata Gomphidae

Clubtail dragonfly

• modified club antennae

• flat labium

Odonata Macromiidae

River skimmers

• large horn on front of head

• spider like long legs

Odonata Calopterygidae

Broadwinged damselflies

• lost 1st antennal segment

• triangular caudal gills

Odonata Coenagrionidae

Narrow winged damselflies

• no cleft on prementum

Odonata Lestidae

Spread-winged damselflies

• Very long petiolate labium

• usually very long and thin