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Review of the species of Trichomalus (Chalcidoidea: Pteromalidae) associated with Ceutorhynchus (Coleoptera: Curculionidae) host species of European origin

Published online by Cambridge University Press:  02 April 2012

Franck J. Muller
Affiliation:
CABI Europe—Switzerland, Rue des Grillons 1, 2800 Delémont, Switzerland
Hannes Baur
Affiliation:
Department of Invertebrates, Natural History Museum, Bernastrasse 15, CH-3005 Bern, Switzerland
Gary A.P. Gibson
Affiliation:
Agriculture and Agri-Food Canada, Biodiversity and Integrated Pest Management, Research Centre, 960 Carling Avenue, Ottawa, Canada
Peter G. Mason
Affiliation:
Agriculture and Agri-Food Canada, Biodiversity and Integrated Pest Management, Research Centre, 960 Carling Avenue, Ottawa, Canada
Ulrich Kuhlmann*
Affiliation:
CABI Europe—Switzerland, Rue des Grillons 1, 2800 Delémont, Switzerland
*
1Corresponding author (e-mail: [email protected]).

Abstract

Six species of Trichomalus Thomson were reared as parasitoids of Ceutorhynchinae hosts in Europe during surveys in 2000–2004. Trichomalus rusticus (Walker) is treated as a valid species, resurrected from synonymy under T. lucidus (Walker), and T. lyttus (Walker) is transferred from synonymy under T. lucidus and newly placed in synonymy with T. rusticus. Illustrated keys to females and males are given to differentiate the six species (T. bracteatus (Walker), T. campestris (Walker), T. gynetelus (Walker), T. lucidus, T. perfectus (Walker), and T. rusticus) except for males of T. bracteatus and T. gynetelus. A lectotype female is designated for T. rusticus. Trichomalus campestris is newly recorded as a parasitoid of Ceutorhynchus cardariae Korotyaev. Implications of the host-parasitoid associations recovered by the surveys are discussed relative to introduction of species to North America for classical biological control.

Résumé

Six espèces de Trichomalus Thomson ont été élevées en tant que parasitoïdes de Ceutorhynchinae en Europe lors de périodes d'échantillonnage entre 2000 et 2004. Trichomalus rusticus (Walker) est traité comme espèce valide et non plus comme synonyme de T. lucidus (Walker), et T. lyttus (Walker) est transféré de sa synonymie avec T. lucidus et nouvellement placé en tant que synonyme de T. rusticus. Une clé illustrée est fournie afin de différencier les mâles et les femelles des six espèces (T. bracteatus (Walker), T. campestris (Walker), T. gynetelus (Walker), T. lucidus, T. perfectus (Walker) et T. rusticus) à l'exception des mâles de T. bracteatus et T. gynetelus. Un lectotype femelle est décrit pour T. rusticus. Trichomalus campestris est trouvé pour la première fois parasitant Ceutorhynchus cardariae Korotyaev. Les associations hôte-parasitoïdes déterminées lors des échantillonnages sont discutées, et en particulier ce que ces résultats impliquent pour l'introduction d'espèces en Amérique du Nord en tant qu'auxiliaires de lutte biologique.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 2007

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