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The Nymph of Rhithrogena impersonata (Ephemerida) and a New Closely Related Species from the Same Locality in Southern Ontario

Published online by Cambridge University Press:  31 May 2012

F. P. Ide
F. P. Ide
Affiliation:
Department of Zoology, University of Toronto
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Extract

Early in the summer of 1951 a small collection of aquatic insects was submitted to the author by J. Goodwin of Toronto, taken from Sheldon Creek in Dufferin County, Ontario. Included were nymphs of two readily distinguishable species of Rithrogena, one having bright red gills and the other hyaline whitish gills, Those with hyaline whitish gills were more abundant and proved to be R. impersonata Mc.D. of which specimens from Baddeck, N.S. and Lachine, P.Q. are in the Canadian National Collection at Ottawa. I have records of this species in both nymphal and adult stages from the Credit River, Peel County, Ontario, where the association of nymph and adult was made, and in the nymphal stage from the Saugeen River in Grey County, Ontario. The nymphs with red gills proved to be those of a new species which, considering genitalic characters, is closely related to R. impersonata.

Type
Articles
Information
The Canadian Entomologist , Volume 86 , Issue 8 , August 1954 , pp. 348 - 356
Copyright
Copyright © Entomological Society of Canada 1954

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