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REVISION OF NORTH AMERICAN AGABUS LEACH (COLEOPTERA: DYTISCIDAE): ELONGATUS-, ZETTERSTEDTI-, AND CONFINIS-GROUPS

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
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Abstract

North American species of Agabus Leach of the elongatus-, zetterstedti-, and confinis-groups, as defined by Larson (1989), are revised. Study of character state distribution indicates that the elongatus- and zetterstedti-groups are clades within the confinis-group but the names are retained in this paper to maintain consistency. Twenty species belonging to this complex occur in North America, namely: elongatus-group with A. elongatus Gyllenhal and A. inexspectatus Nilsson; zetterstedti-group with A. zetterstedti Thomson; and the confinis-group with A. thomsoni (J. Sahlberg), A. moestus (Curtis), A. clypealis (Thomson), A. phaeopterus (Kirby), A. immaturus sp.nov. (Great Lakes and Maritime Provinces regions), A. canadensis Fall, A. audeni Wallis, A. mackenziensis sp.nov. (northwestern Canada), A. bicolor (Kirby), A. subfuscatus Sharp, A. discolor (Harris), A. approximate Fall, A. kootenai sp.nov. (southwestern Canada and northwestern United States), A. inscriptus (Crotch), A. smithi Brown, A. sasquatch sp.nov. (alpine areas of California and Nevada), and A. confinis (Gyllenhal). For each species the following information is provided: synonymy; description and illustration of taxonomically useful characters; notes on relationships, variation, distribution, and ecology; and a map of North American collection localities. A key to the North American species of the confinis-group is presented. Lectotypes are designated for A. subfuscatus Sharp, Gaurodytes inscriptus Crotch, G. ovoideus Crotch, and G. longulus LeConte.

Résumé

Les espèces nord-américaines d’Agabus Leach des groupes elongatus, zetterstedti et confinis, tels que définis par Larson (1989), ont fait l’objet d’une révision. L’étude de la distribution des caractères a permis d’établir que les groupes elongatus et zetterstedti constituent des clades au sein du groupe confinis, mais les noms sont conservés ici pour éviter toute confusion. Vingt espèces appartenant à ce complexe vivent en Amérique du Nord : ce sont, au sein du groupe elongatus, A. elongatus Gyllenhal et A. inexpectatus Nilsson; au sein du groupe zetterstedti, A. zetterstedti Thomson; et au sein du groupe confinis, A. thomsoni (J. Sahlberg), A. moestus (Curtis), A. clypealis (Thomson), A. phaeopterus (Kirby), A. immaturus sp.nov. (région des Grands Lacs et provinces maritimes), A. canadensis Fall, A. audeni Wallis. A. mackenziensis sp.nov. (région nord-ouest du Canada), A. bicolor (Kirby). A. subfuscatus Sharp, A. discolor (Harri s), A. approximatus Fall, A. kootenai sp. nov. (sud-ouest du Canada et nord-ouest des États-Unis), A. inscriptus (Crotch), A. smithi Brown, A. sasquatch sp.nov. (zones alpines de la Californie et du Nevada), et A. confinis (Gyllenhal). On trouvera pour chaque espèce les informations suivantes : synonymies, description et illustration des caractéristiques taxonomiques diagnostiques, notes sur les liens de parenté, variation, répartition et écologie, enfin une carte des points de capture en Amérique du Nord. Une clé d’identification des espèces nord-américaines du groupe confinis est également présentée. Des lectotypes ont été désignés pour les espèces A. subfuscatus Sharp, Gaurodytes inscriptus Crotch, G. ovoideus Crotch et G. longulus LeConte.

[Traduit par la rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 123 , Issue 6 , December 1991 , pp. 1239 - 1317
Copyright
Copyright © Entomological Society of Canada 1991

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References

Anderson, R.D. 1962. The Dytiscidae (Coleoptera) of Utah: Keys, original citation, types and Utah distribution. Gt. Basin Nat. 22: 54–75.Google Scholar
Brown, W.J. 1930. New species of Coleoptera I. Can. Ent. 62: 87–92.CrossRefGoogle Scholar
Carr, F.S. 1930. New Canadian Coleoptera — I. Can. Ent. 62: 278–279.CrossRefGoogle Scholar
Carr, J.L., and Leech, H.B.. 1966. The rediscovery of Agabus audeni Wallis, and a note on Agabus coxalis Sharp (Coleoptera: Dytiscidae). Can. Ent. 98: 544–550.CrossRefGoogle Scholar
Crotch, G.R. 1873. Revision of the Dytiscidae of the United States. Trans. Am. ent. Soc. 4: 383–424.Google Scholar
Curtis, J. 1835. Appendix, Natural History section. p. lxin Ross, J., Narrative of a Second Voyage in Search of a North-West Passage, etc. Webster, London. [Reprinted 1969, Greenwood, NY.]Google Scholar
Fall, H.C. 1922. A review of the North American species of Agabus. Privately printed. Mount Vernon, NY. 36 pp.Google Scholar
Gyllenhal, L. 1808. Insecta Svecica descripta, classis I, Coleoptera sive Eleutherata, Vol. I. part 1. Scaris. 660 pp.Google Scholar
Gyllenhal, L. 1826. See C.R. Sahlberg 1826.Google Scholar
Harris, T.W. 1828. Contributions to entomology. No. VI. New Engl. Fmr. 7: 164.Google Scholar
Hatch, M.H. 1953. The beetles of the Pacific Northwest. Part 1: Introduction and Adephaga. Univ. Wash. Publ. Biol. 16. 340 pp.Google Scholar
Hellén, W. 1929. Zur Kenntnis einger Dytisciden Finnlands. Notul. ent. 9: 34–46.Google Scholar
Kirby, W. 1837. The Insects. In Richardson, J., Fauna Boreali-Americana, Part 4. London. 249 pp.Google Scholar
Larson, D.J. 1975. The predaceous water beetles (Coleoptera: Dytiscidae) of Alberta: Systematics, natural history and distribution. Quaest. ent. 11: 245–498.Google Scholar
Larson, D.J. 1985. Structure in temperate predaceous diving beetle communities (Coleoptera: Dytiscidae). Holarctic Ecol. 8: 18–32.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. Can. Ent. 121: 861–919.CrossRefGoogle Scholar
Larson, D.J., and Nilsson, A.N.. 1985. The Holarctic species of Agabus (sensu lato) Leach (Coleoptera: Dytiscidae). Can. Ent. 117: 119–130.CrossRefGoogle Scholar
LeConte, J.L. 1878. Descriptions of new species. In Hubbard, H.G., and Schwarz, E.A., The Coleoptera of Michigan. Proc. Am. phil. Soc. 17: 593–626.Google Scholar
Leech, H.B. 1938. Descriptions of three new species of Agabus from Hudson Bay (Coleoptera: Dytiscidae). Can. Ent. 70: 123–127.CrossRefGoogle 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
Matthews, J.V. Jr, 1979. Tertiary and Quaternary environments: Historical background for an analysis of the Canadian insect fauna. pp. 31–86in Danks, H.V. (Ed.), Canada and its Insect Fauna. Mem. ent. Soc. Can. 108.Google Scholar
Nilsson, A.N. 1980. Morphology and habitats of the larval stages in the predaceous water beetle species Agabus arcticus and A. confinis (Coleoptera: Dytiscidae). Ent. Gen. 6: 355–361.Google Scholar
Nilsson, A.N. 1981. Notes on some northern species of Agabus (Coleoptera, Dytiscidae). Notul. ent. 61: 191–196.Google Scholar
Nilsson, A.N. 1982 a. The larval stages of Agabus elongatus (Gyll.) and A. wasastjernae (Sahlb.) (Coleoptera: Dytiscidae). Ent. Scand. 13: 69–76.CrossRefGoogle Scholar
Nilsson, A.N. 1982 b. A key to the identification of the known third-stage larvae of the Fennoscandian species of the genus Agabus (Coleoptera: Dytiscidae). Ent. Scand. 13: 333–338.CrossRefGoogle Scholar
Nilsson, A.N. 1983. The larval stages of Agabus approximatus Fall and A. congener (Thunberg) (Col., Dytiscidae). Aquat. Insects 5: 9–15.CrossRefGoogle Scholar
Nilsson, A.N. 1984. Nomenclatural and distributional notes on some northern species of Agabus (Coleoptera, Dytiscidae). Notul. ent. 64: 185–188.Google Scholar
Nilsson, A.N. 1985. The larval instars of the Holarctic Agabus zetterstedti Thomson (Coleoptera: Dytiscidae). Ent. Scand. 15: 487–491.CrossRefGoogle Scholar
Nilsson, A.N. 1986. Life cycles and habitats of the northern European Agabini (Coleoptera, Dytiscidae). Entomologica Basiliensia 11: 391–417.Google Scholar
Nilsson, A.N. 1987 a. A key to the first-instar larvae of Fennoscandian Agabus (Coleoptera: Dytiscidae). Fauna nouv. Ser. B 34: 131–137.Google Scholar
Nilsson, A.N. 1987 b. A morphometric study of the two cryptic species Agabus congener (Thunberg) and A. lapponicus (Thomson) (Coleoptera: Dytiscidae). Ent. Scand. 18: 67–77.CrossRefGoogle Scholar
Nilsson, A.N. 1989. Larval morphology, biology and distribution of Agabus setulosus (Coleoptera: Dytiscidae). Ent. Scand. 19: 381–391.CrossRefGoogle Scholar
Nilsson, A.N. 1990. Revisional notes on selected east Palaearctic species of Agabus Leach (Coleoptera, Dytiscidae). Ent. Tidskr. 111: 149–161.Google Scholar
Nilsson, A.N., Stille, B., and Douwes, P.. 1988. Allozyme variation supports the recognition of Agabus lapponicus (Thomson) (Coleoptera, Dytiscidae) as a distinct species. Ent. Scand. 19: 31–33.CrossRefGoogle Scholar
Sahlberg, C.R. 1826. Dissertatio entomologica Insecta Fennica enumerias. Vol. 1, part III: 169. Helsingfors.Google Scholar
Sahlberg, J. 1871. Anteckningar till Lapplands Coleopter-fauna. Notul. Fauna Flora fenn. 11: 385–440.Google Scholar
Sahlberg, J. 1880. Bidrag till Nordvesra Sibiriens Insektfauna. Svenska Vet.-Ac. Handl. 17: 1–115.Google Scholar
Sharp, D. 1882. On aquatic carnivorous Coleoptera or Dytiscidae. Sci. Transactions R. Dublin Soc. 2: 1–1003.Google Scholar
Thomson, C.G. 1856. Ofversigt af de arter inom familjen Dytisci som blifvit antraffade pa Skandinaviska halfon. Vetensk. Akad. Handl. 1854: 177–237.Google Scholar
Thomson, C.G. 1859. Skandinaviens Coleoptera II. Lund. 304 pp.CrossRefGoogle Scholar
Thomson, C.G. 1867. Skandinaviens Coleoptera IX. Lund. 407 pp.Google Scholar
Thunberg, C.P. 1794. Dissertatio entomologica novas insectorum species sistens, part 6. Upsaliae. 130 pp.Google Scholar
Wallis, J.B. 1933. Some new Dytiscidae (Coleoptera). Can. Ent. 65: 268–278.CrossRefGoogle Scholar
Wiezlak, W.W. 1980. Agabus pseudoclypealis Scholz (Coleoptera, Dytiscidae) new to the Polish fauna. Polskie Pismo Entomologiczne 50: 159–163.Google Scholar
Zaitzev, F.A. 1953. Fauna of the U.S.S.R., Vol. 4. Amphizoidae, Hygrobiidae, Dytiscidae, Gyrinidae. English Translation (1972), Israel Program for Scientific Translations. Jerusalem. 401 pp.Google Scholar
Zimmermann, A. 1934. Monographie der paläarktischen Dytisciden V. Colymbetinae. (1. Teil: Copelatini, Agabini: Gattung Gaurodytes (Thoms.). Koleopt. Rundsch. 20: 138–214.Google Scholar