Identification

1
Arthropoda insects

• Identification
• 1 pair of antennae (or absent)
• 0 or 3 pairs of legs (welts, prolegs usually
  occur in legless larvae)
• Adult body with 3 distinct segments
• Wings or wingpads often present

2
Arthropoda (insects)Diptera
http//www.wwa-fs.bayern.de/datenufakten/Biologie/

• Identification
• Larvae maggotlike
• Prolegs, pseudopods, or fleshy welts often
  present
• Pupae difficult to identify
• Biology/ecology
• Herbivores, detritivores, predators
• Chironomidae especially abundant in eutrophic
  waters
• Important vertebrate prey
• Medically, economically important

Chironomidae
Tipulidae
http//www.cals.ncsu.edu/course/ent525/water/aquat
ic/images/19.jpg
3
Arthropoda (insects)Coleoptera
http//www.toyen.uio.no/ekle_kryp/images/insekter/
dytiscidae.jpg
Dytiscidae

• Identification
• Adult hard outer wing membrane wings at rest
  are parallel
• Larvae legs antennae visible 1 tarsal claw
• Biology/ecology
• Herbivores, detritivores, predators

http//www.umd.umich.edu/dept/na/aquatic_insecta/c
oleoptera/
4
Arthropoda (insects)Hemiptera
Gerridae

• Identification
• Adult piercing, sucking mouthparts soft outer
  wing membrane wings at rest are crossed
• Nymphs smaller than adults fewer body segments
• Biology/ecology
• Most are predators
• Some (Corixidae) are detritivores

http//www.nps.gov/olym/insect/gerridae.jpg
http//bugguide.net/images/cache
Belostomatidae
5
Arthropoda (insects)Ephemeroptera
http//guillaume.doucet.free.fr/photos/ephemeres/B
aetidae

• Identification
• Nymphs 2-3 long appendages at tip of abdomen
  sides of abdomen with broad, flat gills 1 tarsal
  claw
• Biology/ecology
• Most are herbivores, detritivores a few predators

Baetidae
Heptageniidae
http//www.benthos.org
6
Arthropoda (insects)Plecoptera
http//www.cacaponinstitute.org

• Identification
• Nymphs 2 long appendages at tip of abdomen some
  abdominal segments lack gills gills not always
  broad or flat 2 tarsal claws
• Biology/ecology
• Herbivores, detritivores, predators
• Important water quality indicators

Pteronarcyidae
Perlidae
http//www.xerces.org
7
Arthropoda (insects)Odonata

• Identification
• Nymphs lower jaw an elbowed, grasping organ
• Biology/ecology
• Predators (mostly insects)

Coenagrionidae
http//www.umd.umich.edu
http//www.ru.ac.za
Libellulidae
8
Arthropoda (insects)Trichoptera
http//www.usask.ca

• Identification
• Larvae 2 prolegs with hooks at abdominal
  terminus antennae small
• Biology/ecology
• Herbivores, detritivores,
• predators

Hydropsychidae
Leptoceridae
http//www.usask.ca