Asymmetric, biraphid diatoms from the Laurentian Great Lakes

Research output: Contribution to journalArticlepeer-review


This taxonomic account of light micrographs from the coastal Laurentian Great lakes contains taxa from the diatom genera Amphora, Halamphora, Cymbella, Cymbopleura, Delicatophycus, Encyonema, Encyonopsis, Reimeria, Gomphonema, Gomphosphenia, Gomphonella, Gomphosinica, and Gomphoneis. A total of 207 samples of surface sediment and periphyton collected from 106 wetland, high-energy, embayment, and deeper nearshore locales are represented. Light micrographs of 154 taxa are presented. Of these, 76 could not be fully identified as known taxa from the existing literature and so are given tentative names, numbers or conferred assignments. Lake and habitat specificity, modeled autecological optima for phosphorus and chloride, and tolerance to anthropogenic stressors are described for 39 of the more common taxa.

Original languageEnglish (US)
Article numbere14887
StatePublished - Feb 2023
Externally publishedYes

Bibliographical note

Funding Information:
Diatom photography was supported by A. Kireta, N. Andresen, J. Kingston, G. Sgro, J. Johansen and M. Ferguson. K. Kennedy and A. Bellamy helped with graphic design and document production. David Williams and two anonymous reviewers provided valuable comments on a previous draft of the manuscript. This document has not been subjected to the U.S. Environmental Protection Agency’s required peer and policy review and therefore does not necessarily reflect the view of the Agency, and no official endorsement should be inferred.

Publisher Copyright:
Copyright 2023 Reavie.


  • Asymmetric
  • Benthic
  • Biraphid
  • Diatoms
  • Ecology
  • Freshwater
  • Great Lakes
  • Light microscope
  • Taxonomy

PubMed: MeSH publication types

  • Journal Article
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, Non-U.S. Gov't


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