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A review of Ellescus (Coleoptera: Curculionidae) in North America: new species and synonyms revealed through integrative taxonomy

Published online by Cambridge University Press:  12 April 2023

Jake H. Lewis Open the ORCID record for Jake H. Lewis [Opens in a new window]  and
Robert S. Anderson
Jake H. Lewis*
Affiliation:
Environmental Science and Informatics Section, Okinawa Institute of Science and Technology, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan Department of Natural History, New Brunswick Museum, 277 Douglas Avenue, Saint John, New Brunswick, E2K 1E5, Canada
Robert S. Anderson
Affiliation:
Beaty Centre for Species Discovery, Canadian Museum of Nature, 1740 Chemin Pink, Gatineau, Quebec, J9J 3N7, Canada
*
*Corresponding author. Email: jake-lewis@oist.jp
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Abstract

A combination of morphological and molecular techniques were used to revise the genus Ellescus Dejean, 1821 (Coleoptera: Curculionidae: Ellescini) in North America. Four valid species of Ellescus are documented from the Nearctic Region. These are the widespread, hypervariable E. ephippiatus (Say, 1831), the Holarctic E. bipunctatus (Linnaeus, 1758) (of which E. borealis (Carr, 1920) new synonym is found to be a new junior synonym), the west coast endemic E. californicus (Casey, 1885) (resurrected from synonymy with E. ephippiatus (Say, 1831)), and the temperately distributed E. michaeli new species. A neotype is designated for E. bipunctatus. The European species, E. scanicus (Paykull, 1792), is determined to have been erroneously reported from North America. An illustrated identification key, distributional data, and DNA sequences (CO1, ITS2) are provided to facilitate identification of the Ellescus species in North America. Notably, CO1 failed to delineate E. ephippiatus and E. michaeli, but the faster-evolving ITS2 reliably separated these taxa, further supporting the use of multiple markers in taxonomic studies and the utility of ITS2 in weevil species delineation.

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Research Paper
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The Canadian Entomologist , Volume 155 , 2023 , e15
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© The Author(s), 2023. Published by Cambridge University Press on behalf of The Entomological Society of Canada

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Footnotes

Taxonomic paper: ZooBank registration #: https://zoobank.org/urn:lsid:zoobank.org:pub:1245F6E6-64FD-40AD-9268-581A251D813D

Subject Editor: Derek Sikes

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