Skip to main content Accessibility help
×
Home

Phylogenetic relationships, larval morphology, and chaetotaxy of the subfamily Coptotominae (Coleoptera: Dytiscidae)

  • Mariano C. Michat (a1) and Yves Alarie (a2)

Abstract

Larval morphology of the monogeneric subfamily Coptotominae (Coleoptera: Dytiscidae) is described and illustrated in detail, with particular emphasis on morphometry and chaetotaxy. Larvae of Coptotomus Say are unique within Dytiscidae in the presence of tracheal gills on the abdominal segments I–VI, a short bifid horn or nasale in instar I, long spinulae on the urogomphus in instar I, and rows of natatory setae on both the internal and external margins of the urogomphus in instars II and III. A cladistic analysis based on 125 larval characters sampled among representatives of other dytiscid subfamilies supports a sister-group relationship between Coptotominae and Laccophilinae based on the shared absence of setae LA10 and LA12 on the second labial palpomere and of pore ABc on the abdominal segment VIII. The clade Coptotominae + Laccophilinae resolved as sister to Lancetinae, all three subfamilies sharing the presence of an unusually low number of lamellae clypeales in the first instar (a condition called four-peg-pattern), postulated to have evolved secondarily within Dytiscidae.

Copyright

Corresponding author

1Corresponding author (e-mail: marianoide@gmail.com).

References

Hide All
Alarie, Y. 1995. Primary setae and pores on the legs, the last abdominal segment, and the urogomphi of larvae of Nearctic Colymbetinae (Coleoptera: Adephaga: Dytiscidae) with an analysis of their phylogenetic relationships. The Canadian Entomologist, 127: 913943.
Alarie, Y. 1998. Phylogenetic relationships of Nearctic Colymbetinae (Coleoptera: Adephaga: Dytiscidae) based on chaetotaxic and porotaxic analysis of head capsule and appendages of larvae. The Canadian Entomologist, 130: 803824.
Alarie, Y., Archangelsky, M., Nilsson, A.N., Watts, C.H.S. 2002. Larval morphology of the genus Lancetes (Coleoptera: Adephaga: Dytiscidae): the hypothesis of sister-group relationship with the subfamily Dytiscinae revisited. The Canadian Entomologist, 134: 467501.
Alarie, Y.Michat, M.C. 2007. Phylogenetic analysis of Hydroporinae (Coleoptera: Dytiscidae) based on larval morphology, with description of first instar of Laccornellus lugubris. Annals of the Entomological Society of America, 100: 655665.
Alarie, Y., Michat, M.C., Miller, K.B. 2011. Notation of primary setae and pores on larvae of Dytiscinae (Coleoptera: Dytiscidae), with phylogenetic considerations. Zootaxa, 3087: 155.
Alarie, Y., Michat, M.C., Nilsson, A.N., Archangelsky, M., Hendrich, L. 2009. Larval morphology of Rhantus Dejean, 1833 (Coleoptera: Dytiscidae: Colymbetinae): descriptions of 22 species and phylogenetic considerations. Zootaxa, 2317: 1102.
Alarie, Y., Nilsson, A.N., Hendrich, L., Watts, C.H.S., Balke, M. 2000. Larval morphology of four genera of Laccophilinae (Coleoptera: Adephaga: Dytiscidae) with an analysis of their phylogenetic relationships. Insect Systematics & Evolution, 31: 121164.
Bacon, M.A., Barman, E.H., White, B.P. 2000. Biology of Coptotomus lenticus (Coleoptera: Dytiscidae: Coptotominae) with a description of its mature larva. The Journal of the Elisha Mitchell Scientific Society, 116: 7581.
Barman, E.H. 2004. A description of the first instar larva of Coptotomus interrogatus (Fabricius) (Coleoptera: Dytiscidae: Coptotominae) with an emphasis on cranial morphology and comments on the phylogeny of basal lineages of Dytiscidae. The Coleopterists Bulletin, 58: 661671.
Bousquet, Y.Goulet, H. 1984. Notation of primary setae and pores on larvae of Carabidae (Coleoptera: Adephaga). Canadian Journal of Zoology, 62: 573588.
Brinck, P. 1948. Coleoptera of Tristan da Cunha. In Results of the Norwegian scientific expedition to Tristan da Cunha 1937–1938, No. 17. Edited by A. W. Braggers. Det Norske Videnskaps-Akademi, Oslo, Norway. Pp. 1121.
Burmeister, E.-G. 1976. Der ovipositor der Hydradephaga (Coleoptera) und seine phylogenetische Bedeutung unter besonderer Berucksichtigung der Dytiscidae. Zoomorphologie, 85: 165257.
De Marzo, L. 1976. Studi sulle larve dei coleotteri ditiscidi. VI. Studio per fini sistematici del comportamento dei caratteri delle mandibole nelle larve di alcune specie della subf. Colymbetinae. Entomologica, Bari, 12: 179198.
De Marzo, L.Nilsson, A.N. 1986. Morphological variation and fine structure of some head structures in larvae of Dytiscidae (Coleoptera). Entomologica Basiliensia, 11: 2942.
Friis, H., Bauer, T., Betz, O. 2003. An insect larva with a ‘pig-snout’: structure and function of the nasale of Hyphydrus ovatus L. (1763) (Coleoptera: Dytiscidae). Journal of Zoology, 261: 5968.
Goloboff, P.A., Farris, J., Nixon, K. 2008. TNT, a free program for phylogenetic analysis. Cladistics, 24: 774786.
Hilsenhoff, W.L. 1980. Coptotomus (Coleoptera: Dytiscidae) in eastern North America with descriptions of two new species. Transactions of the American Entomological Society, 105: 461471.
Kitching, I.J., Forey, P.L., Humphries, C.J., Williams, D.M. 1998. Cladistics, second edition. The theory and practice of parsimony analysis. Systematics Association publications, 11. Oxford University Press, New York, United States of America.
Larson, D.J., Alarie, Y., Roughley, R.E. 2000. Predaceous diving beetles (Coleoptera: Dytiscidae) of the Nearctic region, with emphasis on the fauna of Canada and Alaska. NRC Research Press, Ottawa, Canada.
Lawrence, J.F. 1991. Order Coleoptera. In Immature insects. Vol. 2. Edited by F.W. Stehr. Kendall/Hunt Publishing Company, Iowa, United States of America. Pp. 144658.
Meier, R.Lim, G.S. 2009. Conflict, convergent evolution, and the relative importance of immature and adult characters in Endopterygote phylogenetics. Annual Review of Entomology, 54: 85104.
Michat, M.C. 2005. Larval morphology and phylogenetic relationships of Bunites distigma (Brullé) (Coleoptera: Dytiscidae: Colymbetinae: Colymbetini). The Coleopterists Bulletin, 59: 433447.
Michat, M.C.Alarie, Y. 2008. Morphology and chaetotaxy of larval Hypodessus cruciatus (Régimbart) (Coleoptera: Dytiscidae: Hydroporinae), and analysis of the phylogenetic relationships of the Bidessini based on larval characters. Studies on Neotropical Fauna and Environment, 43: 135146.
Michat, M.C.Alarie, Y. 2009. Phylogenetic relationships of Notaticus (Coleoptera: Dytiscidae) based on larval morphology. Annals of the Entomological Society of America, 102: 797808.
Michat, M.C., Alarie, Y., Torres, P.L.M., Megna, Y.S. 2007. Larval morphology of the diving beetle Celina and the phylogeny of ancestral hydroporines (Coleoptera: Dytiscidae: Hydroporinae). Invertebrate Systematics, 21: 239254.
Michat, M.C.Archangelsky, M. 2009. Phylogenetic relationships of Leuronectes Sharp (Coleoptera: Dytiscidae: Agabinae) based on larval morphology and chaetotaxy. Insect Systematics & Evolution, 40: 207226.
Michat, M.C., Archangelsky, M., Fernández, L.A. 2010. Larval description and chaetotaxic analysis of Gyrinus monrosi Mouchamps, 1957 (Coleoptera: Gyrinidae). Koleopterologische Rundschau, 80: 114.
Michat, M.C., Archangelsky, M., Torres, P.L.M. 2005. Descriptions of the preimaginal stages of Lancetes marginatus (Steinheil) and L. biremis Ríha (Coleoptera: Dytiscidae), and comparative notes with other Lancetes larvae. Studies on Neotropical Fauna and Environment, 40: 129142.
Michat, M.C.Torres, P.L.M. 2005. Larval morphology of Macrovatellus haagi (Wehncke) and phylogeny of Hydroporinae (Coleoptera: Dytiscidae). Insect Systematics & Evolution, 36: 199217.
Michat, M.C.Torres, P.L.M. 2009. A preliminary study on the phylogenetic relationships of Copelatus Erichson (Coleoptera: Dytiscidae: Copelatinae) based on larval chaetotaxy and morphology. Hydrobiologia, 632: 309327.
Michat, M.C.Torres, P.L.M. 2011. Phylogenetic relationships of the tribe Vatellini based on larval morphology, with description of Derovatellus lentus (Coleoptera: Dytiscidae: Hydroporinae). Annals of the Entomological Society of America, 104: 863877.
Miller, K.B. 2001. On the phylogeny of the Dytiscidae (Insecta: Coleoptera) with emphasis on the morphology of the female reproductive system. Insect Systematics & Evolution, 32: 4592.
Nilsson, A.N. 1988. A review of primary setae and pores on legs of larval Dytiscidae (Coleoptera). Canadian Journal of Zoology, 66: 22832294.
Nilsson, A.N. 2001. World Catalogue of Insects, Vol. 3: Dytiscidae (Coleoptera). Apollo Books, Stenstrup, Denmark.
Ribera, I., Vogler, A.P., Balke, M. 2008. Phylogeny and diversification of diving beetles (Coleoptera: Dytiscidae). Cladistics, 24: 563590.
Ruhnau, S.Brancucci, M. 1984. Studies on the genus Lancetes. 2. Analysis of its phylogenetic position using preimaginal characters (Coleoptera, Dytiscidae). Entomologica Basiliensia, 9: 80107.
Wiley, E.O. 1981. Phylogenetics: the theory and practice of phylogenetic systematics. John Wiley and Sons, New York, United States of America.
Wilson, C.B. 1923. Water beetles in relation to pondfish culture, with life histories of those found in fishponds at Fairport, Iowa. Bulletin of the Bureau of Fisheries, 39: 232345.

Phylogenetic relationships, larval morphology, and chaetotaxy of the subfamily Coptotominae (Coleoptera: Dytiscidae)

  • Mariano C. Michat (a1) and Yves Alarie (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed