Plecoptera
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Plecoptera. Typically clean, cool, running water - rocks, boulders Few in lakes Sensitive indicator taxa. Adults. Riparian vegetation, or on rocks and debris along stream. Larvae. Typically switch food type with development: Usually herbivore-detritivore - switch to omnivore-carnivore

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Plecoptera

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Plecoptera

Plecoptera

Typically clean, cool, running water - rocks, boulders

Few in lakes

Sensitive indicator taxa


Adults

Adults

  • Riparian vegetation, or on rocks and debris along stream


Larvae

Larvae

  • Typically switch food type with development:

  • Usually herbivore-detritivore - switch to omnivore-carnivore

  • Shredders

  • Predators


Emergence

Emergence

  • Through year

  • Predators - emerge spring-summer


Adult behavior

Adult behavior

  • Males and females drum to communicate

  • Tap substrate with tip of abdomen


Drumming

Drumming

  • Females release eggs over stream surface

  • Eggs stick to surfaces

  • http://www.ias.unt.edu/~StoneflyHome/Home/


Life history

Life history

  • Univoltine = annual life cycle

  • Few are semivoltine = 2-3 generations / year

  • Hemimetabolous metamorphosis

  • = incomplete metamorphosis

    • No pupal stage


Morphology

Morphology

  • Gills in some

  • Cerci - usually 2

  • Wingpads

  • 2 claws at end of each leg


Http www unb ca fredericton science biology invertebrate key plecoptera plecoptera key nb htm

http://www.unb.ca/fredericton/science/biology/Invertebrate_key/Plecoptera/Plecoptera_key_NB.htm


Be able to id to family

Be able to ID to family

  • Gills, mouth parts

  • Pteronarcyidae - finely branched gills on thorax and first 2 abdomen segments


Pteronarcyidae

Pteronarcyidae


No gills on abdomen finely branched gills on thoracic segments perlidae

No gills on abdomenFinely branched gills on thoracic segments = Perlidae


Perlodidae

Perlodidae

  • Small fingerlike gills on thorax or none

  • Distinct pigmentation on head and thorax

  • Cerci as long as abdomen


Chloroperlidae

Chloroperlidae

  • Thoracic wing pads parallel; cerci <3/4 length of abdomen, thorax and head usually without pattern


Capniidae

Capniidae

  • Abdomen divided by membraneous fold along its whole length, middle segments of abdomen, when viewed from above, are wider than the base of the terminal segments, body is usually brown in color


Leuctridae

Leuctridae

  • Abdomen divided by membraneous fold along no more than the first  6 segments, sides of abdomen more or less parallel down their length, usually pale in colour


Nemouridae tarsal segment 2 shorter than 1 taenioptergidae tarsal segment 2 to 1

Nemouridae: tarsal segment 2 shorter than 1Taenioptergidae: tarsal segment 2 = to 1


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