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A REVISION OF THE GENUS COLON HERBST (COLEOPTERA; LEIODIDAE; COLONINAE) OF NORTH AMERICA

Published online by Cambridge University Press:  31 May 2012

Stewart B. Peck  and
Karl Stephan
Stewart B. Peck
Affiliation:
Department of Biology, Carleton University, Ottawa, Ontario, Canada K1S 5B6
Karl Stephan
Affiliation:
Rt. 1, Box 913, Red Oak, Oklahoma, USA 74563
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Abstract

The traditional subgenera of Colon Herbst containing the North American fauna are Colon s.str., Myloechus Latreille, and Eurycolon Ganglbauer. We use these and also describe Tricolon and Striatocolon as new subgenera. Identification of species in the genus Colon is taxonomically difficult because of allometric variation of external characters in males, and lack of distinctive characters in females. We present keys, illustrations, and descriptions to distinguish the known North American species. A total of 37 species names have been previously applied to Colon in North America. We designate lectotypes for Colon thoracicum Horn, C. asperatum Horn, C. oblongum Blatchley, C. dentatum LeConte, C. pusillum LeConte, C. putum Horn, C. hubbardi Horn, C. nevadense Horn, and C. liebecki Wickham. We recognize 16 names as synonyms of previously named species as follows: C. clavatum Mannerheim = C. bidentatum Sahlberg; C. complicatum Hatch = C. celatum Horn; C. decore Casey = C. thoracicum Horn; C. excisum Hatch = C. hubbardi Horn; C. femorale Hatch = C. lanceolatum Hatch; C. kincaidi Hatch = C. hubbardi Horn; C. mannerheimi Szymczakowski = C. oblongum Blatchley; C. pusillum Horn = C. dentatum LeConte; C. putum Horn = C. dentatum LeConte; C. paradoxum Horn = C. bidentatum Sahlberg; C. nevadense Horn = C. celatum Horn; C. productum Hatch = C. hubbardi Horn; C. rufum Hatch = C. dentatum LeConte; C. schuhi Hatch = C. discretum Hatch; C. serripoides Hatch = C. asperatum Horn; C. pribilof Hatch = C. liebecki Wickham. We describe 22 species as new, as follows. In the subgenus Tricolon: C. blatchleyi and C. pacificum. In the subgenus Colon: C. arcum, C. nitidum, C. politum, and C. vancouverensis. In the subgenus Myloechus: C. boreale, C. californicum, C. chihuahua, C. chiricahua, C. grossum, C. hatchi, C. hesperium, C. incisum, C. longitorsum, C. megasetosum, C. mesum, C. monstrosum, C. pararectum, C. potosi, C. similare, and C. xilitla. All these species are restricted to North America except for C. bidentatum and C. politum which are northern Holarctic. This yields 42 species recognized for the North American fauna. These beetles occur in forest, open woodland, and grassland habitats. Their larvae, biology, and food are still unknown.

Résumé

Les sous-genres de Colon Herbst utilisés traditionnellement pour accomoder les espèces nord-américaines sont Colon s.str., Myloechus Latreille et Eurycolon Ganglebauer. Nous conservons ces noms et décrivons également deux nouveaux sous-genres, Tricolon et Striatocolon. L’identification des espèces du genre Colon comporte des problèmes taxonomiques reliés à la variation allométrique des caractéristiques externes des mâles et à l’absence de bons caractères diagnostiques chez les femelles. On trouvera ici des clés, des illustrations et des descriptions qui permettront de distinguer les espèces connues en Amérique du Nord. Au total, 37 noms d’espèces figurent sous le nom générique Colon en Amérique du Nord. Nous avons choisi des lectotypes pour représenter Colon thoracicum Horn, C. asperatum Horn, C. oblongum Blatchley, C. dentatum LeConte, C. pusillum LeConte, C. putum Horn, C. hubbardi Horn, C. nevadense Horn et C. liebecki Wickham. Nous considérons 16 noms comme synonymes d’espèces préalablement nommées : C. clavatum Mannerheim = C. bidentatum Sahlberg; C. complicatum Hatch = C. celatum Horn; C. decore Casey = C. thoracicum Horn; C. excisum Hatch = C. hubbardi Horn; C. femorale Hatch = C. lanceolatum Hatch; C. kincaidi Hatch = C. hubbardi Horn; C. mannerheimi Szymczakowski = C. oblongum Blatchley; C. pusillum Horn = C. dentatum LeConte; C. putum Horn = C. dentatum LeConte; C. paradoxum Horn = C. bidentatum Sahlberg; C. nevadense Horn = C. celatum Horn; C. productum Hatch = C. hubbardi Horn; C. rufum Hatch = C. dentatum LeConte; C. schuhi Hatch = C. discretum Hatch; C. serripoides Hatch = C. asperatum Horn; C. pribilof Hatch = C. liebecki Wickham. Nous décrivons ici 22 nouvelles espèces : dans le sous-genre Tricolon, C. blatchleyi et C. pacificum, dans le sous-genre Colon, C. arcum, C. nitidum, C. politum et C. vancouverensis, dans le sous-genre Myoloechus, C. boreale, C. californicum, C. chihuahua, C. chiricahua, C. grossum, C. hatchi, C. hesperium, C. incisum, C. longitorsum, C. megasetosum, C. mesum, C. monstrosum, C. pararectum, C. potosi, C. similare et C. xilitla. Toutes ces espèces sont strictement nord-américaines, à l’exception de C. bidentatum et de C. politum qui vivent dans le nord de la zone holarctique. Il y a donc 42 espèces reconnues en Amérique du Nord. Ces coléoptères vivent dans les forêts, les boisés ouverts et les zones herbacées. Les larves de ces insectes, leur biologie et leurs habitudes alimentaires ne sont pas encore connues.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 128 , Issue 4 , August 1996 , pp. 667 - 741
Copyright
Copyright © Entomological Society of Canada 1996

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