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THE HOLARCTIC SPECIES OF AGABUS (SENSU LATO) LEACH (COLEOPTERA: DYTISCIDAE)

Published online by Cambridge University Press:  31 May 2012

David J. Larson  and
Anders N. Nilsson
David J. Larson
Affiliation:
Department of Biology, Memorial University, St. John's, Newfoundland A1B 3X9
Anders N. Nilsson
Affiliation:
Department of Ecological Zoology, University of Umeå, S-901 87, Umeå, Sweden
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Abstract

The taxonomy, distribution, and ecology of the Holarctic species of Agabus (Coleoptera: Dytiscidae) are reviewed. Seventeen species occur in both the Nearctic and Palaearctic regions. The following new synonymy is proposed (valid name given last): A. solus Leech = A. adpressus Aubé; A. sharpi Jacobson and A. pseudoconfertus Wallis = A. opacus Aubé; A. kenaiensis Fall = A. wasastjernae (Sahlberg) and A. hudsonicus Leech = A. zaitzewi Poppius, thus each of these species is recognized for the first time as being Holarctic. The Nearctic species A. ontarionis Fall is reduced in status to a subspecies of A. fuscipennis (Payk.). Agabus congener (Thunb.) is redefined and Nearctic specimens formerly placed in the species are assigned to A. thomsoni (J. Sahlberg). The reports of Palaearctic occurrence of A. approximates Fall and A. discolor (Harris) are considered to be in error, the records referring to A. levanderi Hellén.

Résumé

La taxonomie, la distribution et l'écologie des espèces Holarctiques de Agabus (Coleoptera : Dytiscidae) sont révisées. On retrouve 17 espèces dans chacune des régions Néarctique et Palaearctique. On propose la synonymie suivante (nom valide en second) : A. solus Leech = A. adpressus Aubé; A. sharpi Jacobson et A. pseudoconfertus Wallis = A. opacus Aubé; A. kenaiensis Fall = A. wasastjernae (Sahlberg) et A. hudsonicus Leech = A. zaitzewi Poppius, chacune de ces espèces étant ainsi reconnue pour la première fois comme étant Holarctique. L'espèce Néarctique A. ontarionis Fall est ramenée au statut de sous-espèce de A. fuscipennis (Payk.). Agabus congener (Thunb.) est redéfinie et des spécimens d'origine Néarctique ayant été considérés comme appartenant à cette espèce sont assignés à A. thomsoni (J. Sahlberg). Les mentions de A. approximates Fall et A. discolor (Harris) dans la région Palaearctique sont considérées erronées, ces mentions se rapportant plutôt à A. levanderi Hellén.

Type
Articles
Information
The Canadian Entomologist , Volume 117 , Issue 1 , January 1985 , pp. 119 - 130
Copyright
Copyright © Entomological Society of Canada 1985

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