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CONNATICHELA ARTEMISIAE, A NEW GENUS AND SPECIES OF WEEVIL FROM THE YUKON TERRITORY (COLEOPTERA: CURCULIONIDAE: LEPTOPIINAE): TAXONOMY, PALEONTOLOGY, AND BIOGEOGRAPHY

Published online by Cambridge University Press:  31 May 2012

Robert S. Anderson
Robert S. Anderson
Affiliation:
Department of Entomology, University of Alberta, Edmonton T6G 2E3
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Abstract

Connatichela artemisiae, a new genus and species of leptopiine weevil endemic to the Yukon Territory, Canada, is described and illustrated. The genus is placed in the group of leptopiine genera characterized by the absence of metepisternal suture, lack of scales on antennal funiculus, and presence of broad scales on antennal scape. Connatichela members are readily distinguished from related leptopiine genera by the presence of connate tarsal claws and the structure of male and female genitalia. Phylogenetic and zoogeographic relationships of the genus are unresolved at present. Adult specimens were found in association with plants of a small species of Artemisia.

Fossil material of mid-Wisconsin age assignable to C. artemisiae from the Yukon Territory, extreme western Northwest Territories, and Alaska suggests a slightly more widespread Pleistocene distribution, with recent restriction to the Yukon Territory. This restriction may have resulted from a decrease, during the post Wisconsin, in availability of dry steppe-tundra habitats throughout most of Beringia.

Résumé

Connatichela artemisiae, un nouveau genre et une nouvelle espèce de charançon leptopiiné endémique au Territoire du Yukon, Canada, est décrit et illustré. Le genre fait partie du groupe de genres leptopiinés caractérisé par l'absence de suture métépisternale, l'absence d'écaillés sur le funicle antennaire et la présence de larges écailles sur le scape antennaire. Les membres de Connatichela se distinguent aisément des autres genres de Leptopiinés apparentés par leurs griffes tarsales jointes à la base et l'aspect de l'appareil génital de mâles et des femelles. Les relations phylogénétiques et biogéographiques ne sont présentement pas résolues. Les adultes se trouvent associés aux plants d'une petite espèce d'Artemisia.

Des fossiles du Wisconsinien Moyen attribuables à C. artemisiae et provenant du Territoire du Yukon, de l'extrême partie ouest des Territoires du Nord-Ouest et de l'Alaska suggèrent une distribution historique un peu plus étendue qu'actuellement. La restriction récente de l'aire de distribution de C. artemisiae au Yukon pourrait être le résultat d'une dimunition, pendant la période post-Wisconsinienne, de la disponibilité de la steppe-toundra aride comme habitat dans la presque totalité de Béringia.

Type
Articles
Information
The Canadian Entomologist , Volume 116 , Issue 11 , November 1984 , pp. 1571 - 1580
Copyright
Copyright © Entomological Society of Canada 1984

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