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Trichoptera of Canada.

Cory S Sheffield1, Jeremy R deWaard2, John C Morse3

  • 1Royal Saskatchewan Museum, 2340 Albert Street, Regina, Saskatchewan, S4P 2V7, Canada Royal Saskatchewan Museum Regina Canada.

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|February 5, 2019
PubMed
Summary

Caddisflies (Trichoptera) are vital freshwater insect indicators. Recent discoveries show a 16.4% increase in Canadian species since 1979, with many more likely awaiting documentation.

Keywords:
TrichopteraBiota of Canadabiodiversity assessmentcaddisflies

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Area of Science:

  • * Entomology
  • * Freshwater Ecology
  • * Biodiversity Assessment

Background:

  • * Trichoptera (caddisflies) are crucial larval components of freshwater ecosystems.
  • * They serve as significant bioindicators for aquatic system health.
  • * Existing taxonomic keys aid in the study of many Canadian caddisfly taxa.

Purpose of the Study:

  • * To document the increase in recorded caddisfly species in Canada since 1979.
  • * To estimate the number of undocumented caddisfly species remaining in Canada.

Main Methods:

  • * Review of taxonomic records and literature published since 1979.
  • * Analysis of newly described taxa and species range extensions.
  • * Integration of DNA barcoding data and adjacent US records for predictive assessment.

Main Results:

  • * The number of recorded caddisfly species in Canada has risen from 546 to 636 (a 16.4% increase) since 1979.
  • * Seventeen of these newly recorded species are taxa described after 1979.
  • * An estimated 129–181 caddisfly species are yet to be documented in Canada.

Conclusions:

  • * Canadian caddisfly biodiversity is greater than previously documented, with ongoing discoveries.
  • * Further research, including DNA barcoding, is essential to fully catalogue Canadian Trichoptera.
  • * An estimated 15-22% of expected caddisfly species remain undiscovered in Canada.