Species (7)

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  Metazoa Arthropoda Insecta Ephemeroptera Ephemeridae Hexagenia

  Hexagenia limbata ssp. venusta

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  Metazoa Arthropoda Insecta Ephemeroptera Ephemeridae Hexagenia

  Hexagenia rigida McDunnough

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  Metazoa Arthropoda Insecta Ephemeroptera Ephemeridae Hexagenia

  Hexagenia munda ssp. elegants

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  Metazoa Arthropoda Insecta Ephemeroptera Ephemeridae Hexagenia

  Hexagenia limbata ssp. limbata

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  Metazoa Arthropoda Insecta Ephemeroptera Ephemeridae Hexagenia

  Hexagenia munda ssp. marylandica

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  Metazoa Arthropoda Insecta Ephemeroptera Ephemeridae Hexagenia

  Hexagenia munda ssp. munda

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  Metazoa Arthropoda Insecta Ephemeroptera Ephemeridae Hexagenia

  Hexagenia bilineata (Say)

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