Variations and Taxonomic Significance of the Chromosome Numbers in The Nearctic Species of the Genus<i>Leptothorax</i>(S.S.) (Formicidae: Hymenoptera)

Loiselle, R.; Francoeur, André; Fischer, Karl; Buschinger, Alfred

doi:10.1080/00087114.1990.10797010

Cited by 21 publications

(19 citation statements)

References 20 publications

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“…B, Heinze 1989b), belong to a cluster of morphologically very similar species in North America, most of which have not yet been formally described. Some taxa, including the two species of this study, were recently characterized by karyotype and allozyme patterns (Heinze and Buschinger 1988b;Heinze 1989b;Loiselle et al 1990). A description of Leptothorax sp.…”

Section: Methodsmentioning

confidence: 99%

Habitat structure, dispersal strategies and queen number in two boreal Leptothorax ants

Heınze

1993

Oecologia

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Abstract. In two nearctic ants, Leptothorax canadensis and Leptothorax sp. A, young queens may either found their own nest solitarily after mating or seek adoption into an established colony. Whether a queen disperses or not is associated with genetically determined queen morphology in Leptothorax sp. A. Whereas a majority of winged queens attempt solitary colony founding after mating, most wingless, intermorphic queens return to their maternal nests and new colonies are founded by budding after hibernation. The latter strategy appears to be correlated with patchy, isolated habitats, whereas in extended boreal forests dispersal on the wing is probably more common. Alternative dispersal strategies strongly affect the average number of queens per colony and seasonal fluctuations of colony structure.

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Section: Methodsmentioning

confidence: 99%

Habitat structure, dispersal strategies and queen number in two boreal Leptothorax ants

Heınze

1993

Oecologia

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“…One species, L. retractus, has been described (Francoeur 1986) and can be distinguished on the basis of several morphological characters, including a sharply angled petiolar node and a notched clypeus. The other two taxa are less easily distinguished on morphological grounds, but chromosome numbers (Heinze and Buschinger 1989;Loiselle et al 1990) and isozyme patterns (Heinze 1989) provide reliable information for identifying species. As in previous papers, these species are referred to as Leptothorax sp.…”

Section: Resultsmentioning

confidence: 99%

“…), which in previous studies have been referred to as L. "muscorum" (= L. canadensis) (Brown 1955;Stuart and Alloway 1982, 1985Stuart 1984). However, this taxon is actually a complex of several species, some of which have been described or can be identified using morphological, karyological, and biochemical techniques (Francoeur 1986;Heinze and Buschinger 1988;Heinze 1989;Loiselle et al 1990). In the present paper, we present data which indicate that H. canadensis frequently employs two members of the L. "muscorum" complex as host species and that colonies often contain slaves of both species.…”

Section: Introductionmentioning

confidence: 96%

Host specificity in the slave-making ant Harpagoxenus canadensis M. R. Smith

Heınze¹,

Stuart²,

Alloway³

et al. 1992

Can. J. Zool.

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1992. Host specificity in the slave-making ant Harpagoxenus canadensis M.R. Smith. Can. J. Zool. 70: 167-170. The slave-making ant Harpagoxenus canadensis frequently parasitizes two host species in the genus Leptothorar (subgenus Leptothorar s.str.) which are part of the L. "muscorum" complex and are currently referred to as Leptothorax sp. A and Leptothorar sp. B. A sympatric member of this subgenus, L. retractus, is rarely enslaved. Of 48 complete slave-maker colonies from various sites, 26 contained only Leptothorax sp. A slaves (54.2%), 11 contained only Leptothorax sp. B slaves (22.9%), and 11 contained slaves of both species (22.9%). Of 65 partial slave-maker colonies from one site, 10 contained only Leptothorax sp. A slaves (15.4%), 55 contained only Leptothorax sp. B slaves (84.6%), and none contained slaves of both species. Leptothorar retractus was common at some sites but was never found as a slave in this study. Differences in host-utilization patterns within and between populations might reflect differing host densities but could be influenced by genetic or learned predispositions of the parasites or differential interspecific compatibilities among the various species. Possible collector bias must also be considered. Female reproductives of the host species ( n = 13) were occasionally found in slave-maker nests. Most of these were Leptothorax sp. A intermorphs (workerlike females; n = 11) and were inseminated but not egg laying. The only Leptothorax sp. A gynomorph (a primarily winged female) was uninseminated and not egg laying, and the only Leptothorax sp. B gynomorph could not be dissected. HEINZE, J., STUART, R. J., ALLOWAY, T. M., et BUSCHINGER, A. 1992. Host specificity in the slave-making ant Harpagoxenus canadensis M.R. Smith. Can. J. Zool. 70 : 167-170. La fourmi esclavagiste Harpago.xenus canadensis parasite frCquemment deux espkces h6tes du genre Leptothorax (sous genre) Leptothorax s.str.) qui font partie du complexe L. (( muscorum )) et sont appelCes ici Leptothorax sp. A et Leptothorax sp. B. Une autre espkce sympatrique du mime sous-genre, L. retractus, est rarement asservie. Des 48 colonies entikrement esclavagistes examinCes B diffkrents endroits, 26 n'utilisaient que des Leptothorux sp. A comme esclaves (54,2%), 11 n'utilisaient que des Leptothorax sp. B (22,9%) et 1 1 contenaient des esclaves des deux espkces (22,9%). Des 65 colonies partiellement esclavagistes rencontries B un endroit, 10 ne contenaient que des Leptothorux sp. A (15,4%), 55 ne contenaient que des Leptothorax sp. B (84,6%) et aucune n'utilisait les deux espkces comme esclaves. Leptothorar retractus Ctait commun

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“…A, and the workerless parasites L. paraxenus and L. faberi (n = 15), but is similar to that ofL. retractus, Leptothorax C and D, and palaearctic L. muscorum (n = 17, 18;Fischer 1987, Loiselle et al, 1990 In three of four enzyme systems which are of diagnostic value, D. pocahontas is indistinguishable from Leptothorax C, but differs from large Leptothorax D and L. retractus (Heinze 1989).…”

Section: Chromosome Numbers and Allozyme Patternsmentioning

confidence: 89%

Doronomyrmex pocahontas: not a workerless parasite but still an enigmatic taxon (Hymenoptera, Formicidae)

Buschinger

Heınze²

1993

Ins. Soc

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Variations and Taxonomic Significance of the Chromosome Numbers in The Nearctic Species of the GenusLeptothorax(S.S.) (Formicidae: Hymenoptera)

Cited by 21 publications

References 20 publications

Habitat structure, dispersal strategies and queen number in two boreal Leptothorax ants

Habitat structure, dispersal strategies and queen number in two boreal Leptothorax ants

Host specificity in the slave-making ant Harpagoxenus canadensis M. R. Smith

Doronomyrmex pocahontas: not a workerless parasite but still an enigmatic taxon (Hymenoptera, Formicidae)

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