Note on the Occurrence of Siphlonurus autumnalis (Ephemeroptera: Siphlonuridae) in a Montana Spring Brook

Robert L. Newell; Michelle L. Anderson

doi:10.3398/064.069.0415

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Robert L. Newell,¹ Michelle L. Anderson²

¹Flathead Lake Biological Station of The University of Montana, 32125 Bio Station Lane, Poison, MT 59860-6815. E-mail: bob.newell@umontana.edu
²Biology Department, University of Montana Western, 710 S, Atlantic, Dillon, MT 59725.

Abstract

The little-known mayfly Siphlonurus autumnalis McDunnough (Ephemeroptera: Siphlonuridae) was collected from several locations in its floodplain habitats along the Middle Fork of the Flathead River in western Montana. To confirm identification, nymphs were reared along with an associated species, S.occidentalis Eaton (Ephemeroptera: Siphlonuridae). Adults emerged from 6 September until 16 October. Habitats are described and the first photos of the 2 sexes are provided.

Citation Download Citation

Robert L. Newell and Michelle L. Anderson "Note on the Occurrence of Siphlonurus autumnalis (Ephemeroptera: Siphlonuridae) in a Montana Spring Brook," Western North American Naturalist 69(4), 551-555, (1 December 2009). https://doi.org/10.3398/064.069.0415

Received: 2 October 2008; Accepted: 1 July 2009; Published: 1 December 2009

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