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A CHIRONOMID (NANOCLADIUS (PLECOPTERACOLUTHUS) BRANCHICOLUS: DIPTERA) PHORETIC ON A STONEFLY (ACRONEURIA LYCORIAS: PLECOPTERA) IN SASKATCHEWAN

Published online by Cambridge University Press:  31 May 2012

L. M. Dosdall  and
P. G. Mason
L. M. Dosdall
Affiliation:
Box 7415, Saskatoon, Saskatchewan S7K 4J3
P. G. Mason
Affiliation:
Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan S7N 0W0
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Abstract

Larvae of the chironomid Nanocladius (Plecopteracoluthus) branchicolus Sæther were found living phoretically with nymphs of the stonefly Acroneuria lycorias (Newman). The male and fourth instar larva of N. (P.) branchicolus are described for the first time. The stonefly and chironomid were found in streams in central and northern Saskatchewan forests. Of six Saskatchewan Perlidae species, the chironomid was associated only with A. lycorias. The chironomid most often occurred beneath stonefly wing pads. In the laboratory chironomid pupation lasted about 2 days with emergence occurring about 2 days prior to stonefly emergence.

Résumé

Les larves du chironomide Nanocladius (Plecopteracoluthus) branchicolus Sæther ont été observées vivant phorétiquement sur les larves du plécoptère Acroneuria lycorias (Newman). Le mâle et la larve du 4° stade de N. (P.) branchicolus sont décrites pour la première fois. Le plécoptère et le chironomide ont été relevés dans des ruisseaux en forêt dans le centre et le nord de la Saskatchewan. Parmi les espèces de Perlidae présentes en Saskatchewan, le chironomide n’a été trouvé associé qu’avec A. lycorias. Le chironomide a été trouvé le plus souvent sous les ébauches alaires. Au laboratoire, la durée de la nymphose du chironomide était d’environ 2 jours, l’émergence se produisant environ 2 jours avant celle du plécoptère.

Type
Articles
Information
The Canadian Entomologist , Volume 113 , Issue 2 , February 1981 , pp. 141 - 147
Copyright
Copyright © Entomological Society of Canada 1981

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References

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