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FIRST RECORDS OF PHORETIC CHIRONOMIDAE (DIPTERA) ASSOCIATED WITH NYMPHS OF PTERONARCYS DORSATA (SAY) (PLECOPTERA: PTERONARCYIDAE)

Published online by Cambridge University Press:  31 May 2012

L.M. Dosdall ,
P.G. Mason  and
D.M. Lehmkuhl
L.M. Dosdall
Affiliation:
Biology Department, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0
P.G. Mason
Affiliation:
Agriculture Canada Research Station, Saskatoon, Saskatchewan, Canada S7N 0X2
D.M. Lehmkuhl
Affiliation:
Biology Department, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0
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Abstract

Eight species of Chironomidae (Diptera), including Cricotopus sp. nr. tremulus, Tvetenia vitracies (Saether), Nanocladius (s.s.) cf. rectinervis (Kieffer), Nanocladius branchicolus Saether, Nanocladius (s.s.) cf. spiniplenus Saether, Paratanytarsus confusus Palmen, Polypedilum (s.s.) convictum (Walker), and Rheotanytarsus sp., are reported for the first time in phoretic association with nymphs of Pteronarcys dorsata (Say) (Plecoptera: Pteronarcyidae). The stoneflies and associated chironomids were found in rivers of central and northern Saskatchewan. Rheotanytarsus sp. and P. convictum were the most common ectosymbionts on P. dorsata. Phoretic larvae were found most frequently attached to the host’s metathorax. Pteronarcys dorsata nymphs may be ideal hosts for phoretic inhabitants because of their abundance, large size, and detrivorous habit.

Résumé

On mentionne huit espèces de Chironomides (Diptera), y compris Cricotopus sp. nr. tremulus, Tvetenia vitracies (Saether), Nanocladius (s.s.) cf. rectinervis (Kieffer), Nanocladius branchicolus Saether, Nanocladius (s.s.) cf. spiniplenus Saether, Paratanytarsus confusus Palmen, Polypedilum (s.s.) convictum (Walker), et Rheotanytarsus sp., rapportés pour la première fois comme étant phorétiques sur des larves de Pteronarcys dorsata (Say) (Plecoptera : Pteronarcyidae). Les plécoptères et leurs symbiontes chironomides ont été trouvés dans des rivières du centre et du nord de la Saskatchewan. Rheotanytarsus sp. et P. convictum étaient les ectosymbiontes les plus communs sur P. dorsata. Les larves phorétiques étaient le plus souvent attachées au métathorax de l’hôte. Les larves de Pteronarcys dorsata sont peut-être des hôtes parfaits pour ces espèces phorétiques, étant donné leur abondance, leur grande taille et leurs habitudes détrivores.

Type
Articles
Information
The Canadian Entomologist , Volume 118 , Issue 6 , June 1986 , pp. 511 - 515
Copyright
Copyright © Entomological Society of Canada 1986

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