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The weevils (Coleoptera: Curculionoidea) of the Maritime Provinces of Canada, II: New records from Nova Scotia and Prince Edward Island and regional zoogeography

Published online by Cambridge University Press:  02 April 2012

Christopher G. Majka ,
Robert S. Anderson  and
David B. McCorquodale
Christopher G. Majka*
Affiliation:
Nova Scotia Museum of Natural History, 1747 Summer Street, Halifax, Nova Scotia, Canada B3H 3A6
Robert S. Anderson
Affiliation:
Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, Ontario, Canada K1P 6P4
David B. McCorquodale
Affiliation:
Cape Breton University, Department of Biology, 1250 Grand Lake Road, Sydney, Nova Scotia, Canada B1P 6L2
*
1Corresponding author (e-mail: c.majka@ns.sympatico.ca).
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Abstract

Seventy-nine species of weevils are newly reported in Nova Scotia and 66 species are newly reported on Prince Edward Island, increasing the known provincial weevil faunas to 244 and 92 species, respectively. Thirty-six species are recorded for the first time in the Maritime Provinces; of these, Ceutorhynchus pallidactylus (Marsham), Listronotus dietzi O'Brien, Corthylus columbianus Hopkins, and Orchidophilus aterrimus (Waterhouse) are recorded for the first time in Canada. Orchidophilus aterrimus has been collected only in exotic domesticated orchids and is not established in the wild. Fourteen species previously recorded on Cape Breton Island, Nova Scotia, are reported from the provincial mainland. Four species — Curculio sulcatulus (Casey), Ceutorhynchus squamatus LeConte, Tachyerges niger (Horn), and Ips calligraphus (Germar) — are removed from the faunal list of Nova Scotia, and three species — Temnocerus cyanellus (LeConte), Curculio nasicus (Say), and Cryphalus ruficollis ruficollis Hopkins — are removed from the faunal list of Prince Edward Island. The combined known weevil fauna of the Maritime Provinces now totals 290 species. The adequacy of collection effort is discussed and in Nova Scotia, where collection effort has been greatest, distribution patterns of selected groups of species are examined. Island faunas are discussed with respect to those of Prince Edward Island and Cape Breton Island. Regional biogeographic patterns of species are also discussed, including possible disjunct populations in Nova Scotia and species that may not have crossed the isthmus of Chignecto to colonize Nova Scotia. Attention is drawn to the long history of introduced species in the region and to ongoing introductions through an examination of the earliest records for the 60 introduced species found in the region.

Résumé

Cet article signale pour la première fois la présence de 79 espèces de charançons en Nouvelle-Écosse et de 66 espèces à l'Île-du-Prince-Édouard, augmentant ainsi à 244 et à 92 respectivement le nombre d'espèces de charançons présents dans ces provinces. On signale 36 espèce pour la première fois dans les provinces maritimes et 4 espèces, soit le Ceutorhynchus pallidactylus (Marsham), le Listronotus dietzi O'Brien, le Corthylus columbianus Hopkins et le Orchidophilus aterrimus (Waterhouse) pour la première fois au Canada. On a récolté le Orchidophilus aterrimus uniquement dans les orchidées domestiquées non indigènes; cette espèce n'est pas présente dans la nature. Quatorze espèces signalées auparavant à l'île du Cap-Breton (Nouvelle-Écosse) sont signalées dans la partie continentale de la province. Quatre espèces, soit le Curculio sulcatulus (Casey), le Ceutorhynchus squamatus LeConte, le Tachyerges niger (Horn) et le Ips calligraphus (Germar) ne figurent pas sur la liste faunique de la Nouvelle-Écosse et trois espèces, soit le Temnocerus cyanellus (LeConte), le Curculio nasicus (Say) et le Cryphalus ruficollis ruficollis Hopkins ne figurent pas sur celle de l'Île-du-Prince-Édouard. Le nombre total des charançons présents dans l'ensemble des provinces maritimes se situe maintenant à 290 espèces. L'article traite du niveau d'intensité des récoltes de charançons. En Nouvelle-Écosse, là où l'effort de récolte a été le plus important, on aborde les modèles de distribution de certains groupes d'espèces. On discute de la faune des îles relativement à celles de l'Île-du-Prince-Édouard et de l'île du Cap-Breton. On examine également les modèles biogéographiques régionaux des espèces, y compris la possibilité de populations isolées en Nouvelle-Écosse et d'espèces qui ne sont peut-être pas arrivées en Nouvelle-Écosse par l'isthme de Chignecto. On souligne la longue tradition d'introduction d'espèces dans la région ainsi que sa persistance jusqu'à aujourd'hui en examinant les premières signalisations des 60 espèces non indigènes que l'on trouve dans la région.

Type
Articles
Information
The Canadian Entomologist , Volume 139 , Issue 3 , June 2007 , pp. 397 - 442
Copyright
Copyright © Entomological Society of Canada 2007

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