Aquatic Insects of Michigan

by Ethan Bright, Museum of Zoology Insect Division and School of Natural Resources and Environment
University of Michigan

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Siphlonueridae (Gray Drakes) of Michigan - Identification

(adapted from Waltz and Burian 2007)

    1a Ab1-2 gills with double lamellae Siphlonurus Eaton
    also: Gills on Ab1-2 subtriangular, broadest near apex; claws of middle and hind legs slightly longer than those of forelegs
    1b Ab1-2 gills with single lamellae, more or less oval Parameletus chelifer Bengtsson

(adapted from Waltz and Burian 2007)

    1a Vein of MP of hindwings simple, unforked Parameletus chelifer Bengtsson
    1b Vein of MP of hindwings forked Siphlonurus Eaton
    also: Abdominal sterna usually with dark spots, longitudinal stripes, oblique strips, U-shaped marks, or dark


    Waltz RD, Burian SK. 2007. Ephemeroptera, pp. 181-236 in Merritt RW, Cummins KW, Berg MB (eds.), An Introduction to the Aquatic Insects of North America, Fourth Edition. Kendall/Hunt Publishing Company, Dubuque, Iowa, USA.

Page created: November 1, 2007; Last edited: November 06, 2013 (EB)