Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-28T04:07:31.171Z Has data issue: false hasContentIssue false
  • English
  • Français

REVISION OF NORTH AMERICAN AGABUS LEACH (COLEOPTERA: DYTISCIDAE): THE SERIATUS-GROUP

Published online by Cambridge University Press:  31 May 2012

D.J. Larson
D.J. Larson
Affiliation:
Department of Biology, Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1B 3X9
Get access Rights & Permissions [Opens in a new window]

Abstract

The nine species of the endemic North American Agabus seriatus-group are revised. All species occur west of the Rocky Mountains with A. lugens LeConte also occurring on the Great Plains and A. seriatus (Say) transcontinental in mid-latitudes. The species are placed in four subgroups, namely the seriates-subgroup with A. seriatus, A. lugens, and A. perplexus Sharp; the brevicollis-subgroup with A. brevicollis LeConte, A. pandurus Leech, and A. roguus new species; the ilybiiformis-subgroup with the single species A. ilybiiformis Zimmermann; and the regularis-subgroup with A. regularis LeConte and A. minnesotensis Wallis. Geographical variation in A. seriatus is analyzed and it is concluded that recognition of subspecies of A. seriatus is not warranted and A. s. intersectus (Crotch), NEW SYNONYMY, is relegated to a synonym of A. seriatus. For each species the following is provided: synonymy; description and illustration of taxonomically useful characters; notes on relationships, variation, distribution, and ecology; and a map of collection localities. A key to species is provided and lectotypes designated for A. brevicollis LeConte, A. lugens LeConte, A. perplexus Sharp, Gaurodytes suturalis Crotch (= A. lugens), and Ilybius regularis LeConte.

Résumé

On trouvera ici la révision des neuf espèces du groupe endémique nord-américain Agabus seriatus. Toutes les espèces vivent à l’ouest des Rocheuses et A. lugens LeConte se trouve également dans les Grandes Plaines, alors qu’A. seriatus (Say) est une espèce trans-continentale aux latitudes moyennes. Les espèces sont rassemblées en quatre sous-groupes, le sous-groupe seriatus formé d’A. seriatus, A. lugens et A. perplexus Sharp, le sous-groupe brevicollis formé d’A. brevicollis LeConte, A. pandurus Leech et A. roguus sp.nov., le sous-groupe ilybiiformis qui ne contient qu’une seule espèce A. ilybiiformis Zimmermann, enfin le sous-groupe regularis formé d’A. regularis LeConte et A. minnesotensis Wallis. La variation géographique d’A. seriatus est examinée et il faut conclure que la reconnaissance de sous-espèces d’A. seriatus n’est pas justifiée; il faut donc reconnaître A. s. intersectus (Crotch), NOUVELLE SYNONYMIE, comme un synonyme d’A. seriatus. Sous entête de chaque espèce, on trouvera la synonymie, la description, l’illustration des caractères diagnostiques, des détails sur les liens de parenté, la variation, la répartition et l’écologie; une carte illustre les points de récolte. Une clé permettra la détermination des espèces; des lectotypes ont été désignés pour A. brevicollis LeConte, A. lugens LeConte, A. perplexus Sharp, Gaurodytes saturalis Crotch (= A. lugens) et Ilybius regularis LeConte.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 129 , Issue 1 , February 1997 , pp. 105 - 149
Copyright
Copyright © Entomological Society of Canada 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Anderson, R.D. 1962. The Dytiscidae (Coleoptera) of Utah: Keys, original citation, types, and Utah distribution. Great Basin Naturalist 22: 54–75.Google Scholar
Aubé, C. 1838. Spécies général des coléoptères de la collection de M. le comte Dejean. VI. Hydrocanthares et Gyriniens. Paris. 16 + 804 pp.Google Scholar
Blatchley, W.S. 1910. The Coleoptera or Beetles of Indiana. Bulletin of the Indiana Department of Geology and Natural Resources 1: 1385 pp.Google Scholar
Crotch, G.R. 1873. Revision of the Dytiscidae of the United States. Transactions of the American Entomological Society 4: 383–424.Google Scholar
Fall, H.C. 1922. A Review of the North American Species of Agabus. Privately printed, Mount Vernon, NY. 36 pp.Google Scholar
Fery, H., and Nilsson, A.N.. 1993. A revision of the Agabus chalconatus- and erichsoni-groups (Coleoptera: Dytiscidae), with a proposed phylogeny. Entomologica Scandinavica 24: 79–108.Google Scholar
Hatch, M.H. 1953. The Beetles of the Pacific Northwest. Part 1: Introduction and Adephaga. University of Washington Publications in Biology 16: 340 pp.Google Scholar
Hilsenhoff, W.L. 1993. Dytiscidae and Noteridae of Wisconsin (Coleoptera). IV. Distribution, habitat, life cycle, and identification of species of Agabini (Colymbetinae). The Great Lakes Entomologist 26: 173–197.Google Scholar
Larson, D.J. 1975. The predaceous water beetles (Coleoptera: Dytiscidae) of Alberta: Systematics, natural history and distribution. Quaestiones entomologicae 11: 245–498.Google Scholar
Larson, D.J. 1989. Revision of North American Agabus Leach (Coleoptera: Dytiscidae): Introduction, key to species groups, and classification of the ambiguus, tristis-, and arcticus-groups. The Canadian Entomologist 121: 861–919.CrossRefGoogle Scholar
Larson, D.J. 1994. Revision of North American Agabus Leach (Coleoptera: Dytiscidae): lutosus-, obsoletus-, and fuscipennis-groups. The Canadian Entomologist 126: 135–181.CrossRefGoogle Scholar
Larson, D.J. 1996. Revision of North American Agabus Leach (Coleoptera: Dytiscidae): The opacus-group. The Canadian Entomologist 128: 613–665.CrossRefGoogle Scholar
LeConte, J.L. 1850. General remarks upon Coleoptera of Lake Superior. pp. 209–241in Agassiz, L. (Ed.), Lake Superior: Its Physical Character, Vegetation and Animals. Boston.Google Scholar
LeConte, J.L. 1852. Descriptions of new species of Coleoptera, from California. Annals of the Lyceum of Natural History of New York 5: 125–216.CrossRefGoogle Scholar
LeConte, J.L. 1857. Report on insects collected on the survey. In Reports of Exploration and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean. Washington. 72 pp.Google Scholar
Leech, H.B. 1938. A Study of the Pacific Coast Species of Agabus, with a Key to the Nearctic Species (Coleoptera: Dytiscidae). Unpublished M.Sc. thesis, University of California, Berkeley, CA.Google Scholar
Leech, H.B. 1942 a. Key to the Nearctic genera of water beetles of the tribe Agabini, with some generic synonymy (Coleoptera: Dytiscidae). Annals of the Entomological Society of America 35: 355–362.CrossRefGoogle Scholar
Leech, H.B. 1942 b. New or insufficiently known Nearctic species and subspecies of Agabus (Coleoptera, Dytiscidae). The Canadian Entomologist 74: 125–194.CrossRefGoogle Scholar
Leech, H.B. 1948. Contributions toward a knowledge of the insect fauna of lower California, No. 11. Coleoptera: Haliplidae, Dytiscidae, Gyrinidae, Hydrophilidae, Limnebiidae. Proceedings of the California Academy of Sciences 24(11): 375–484, pls. 20–21.Google Scholar
Leech, H.B., and Chandler, H.P.. 1956. Aquatic Coleoptera. pp. 293–371in Usinger, R.L. (Ed.), Aquatic Insects of California. University of California Press, Berkeley, CA.CrossRefGoogle Scholar
Matta, J.F. 1986. Agabus (Coleoptera: Dytiscidae) larvae of southeastern United States. Proceedings of the Entomological Society of Washington 88: 515–520.Google Scholar
Melsheimer, F.E. 1844. Descriptions of new species of Coleoptera of the United States. Proceedings of the Academy of Natural Sciences of Philadelphia 2: 26–47.Google Scholar
Motschulsky, V. 1959. Coléoptères nouveaux de la Californie. Bulletin de la Société Imperiale des Naturalistes de Moscou 32: 122–185.Google Scholar
Nilsson, A.N., Roughley, R.E., and Brancucci, M.. 1989. A review of the genus- and family-group names of the family Dytiscidae Leach (Coleoptera). Entomologica scandinavica 20: 287–316.CrossRefGoogle Scholar
Say, T. 1823. Descriptions of insects of the families Carabici and Hydrocanthari of Latreille, inhabiting North America. Transactions of the American Philosophical Society 2: 1–109.CrossRefGoogle Scholar
Sharp, D. 1882. On aquatic carnivorous Coleoptera or Dytiscidae. Scientific Transactions of the Royal Dublin Society 2: 1–1003.Google Scholar
Wallis, J.B. 1933. Some new Dytiscidae. The Canadian Entomologist 65: 268–278.CrossRefGoogle Scholar
Zimmermann, A. 1919. Die Schwimmkafer des Deutchen Entomologischen Museums in Berlin-Dahlem. Archive für Naturgeschichte 8: 68–249.Google Scholar
Zimmermann, A. 1928. Neuer Beitrag zur Kenntnis der Schwimmkafer. Wiener Entomologische Zeitunge 44: 165–187.Google Scholar