O complexo Solenopsis saevissima na América do Sul (Hymenoptera: Formicidae)

Wilson, Edward O.

doi:10.1590/s0074-02761952000100003

Cited by 21 publications

(22 citation statements)

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“…This large region encompasses a wide range of environments including grasslands, tropical forests, elevated forests, flooded forests, and wetlands (Eva et al 2002), within which colonies of S. invicta are limited to open or disturbed habitats. Due to a previous lack of known species-diagnostic morphological characters, the S. saevissima species-group was once considered to consist of a single widespread, polytypic species (Wilson 1952). More recently, the revisionary work of Buren et al (1974), Trager (1991), and Pitts (2002) has resulted in the description of numerous species in the group recognized on the basis of unique suites of morphological characters.…”

Section: Background Biology Of Solenopsis Invictamentioning

confidence: 99%

PHYLOGEOGRAPHIC STRUCTURE OF THE FIRE ANTSOLENOPSIS INVICTAIN ITS NATIVE SOUTH AMERICAN RANGE: ROLES OF NATURAL BARRIERS AND HABITAT CONNECTIVITY

2005

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Abstract. We generated mitochondrial DNA (mtDNA) sequence data from 402 individuals of the fire ant Solenopsis invicta collected from 11 native populations and analyzed these data using a combination of demographic, phylogenetic, and phylogeographic methods to infer features of the evolutionary history of this species. Prior expectations regarding high levels of genetic structure and isolation by distance among populations were supported by the data, but we also discovered several unanticipated patterns. Our analyses revealed a major genetic break between S. invicta mtDNA haplotypes that coincides with the Mesopotamia wetlands region of South America, resulting in two higher level nested clade groupings. In addition, we identified contrasting patterns of genetic differentiation within these two major groups, which may reflect differences in connectivity of suitable habitat in different parts of the native range of S. invicta. Our study represents the first attempt to understand the phylogeographic history of S. invicta across its native range.

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Section: Background Biology Of Solenopsis Invictamentioning

confidence: 99%

PHYLOGEOGRAPHIC STRUCTURE OF THE FIRE ANTSOLENOPSIS INVICTAIN ITS NATIVE SOUTH AMERICAN RANGE: ROLES OF NATURAL BARRIERS AND HABITAT CONNECTIVITY

2005

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“…Ants comprise a diverse and successful lineage of highly social insects that display a remarkable array oflife histories and habits. The presence, in several disparate taxa, of clusters of closely related social forms differing profoundly in colony social organization and reproductive strategies, while exhibiting only slight morphological differentiation, suggests that behavioral evolution is decoupled from morphological evolution in these groups and that such behavioral evolution may be an important component in the process of speciation (Wilson, 1971;Crozier, 1977aCrozier, , 1981Brian, 1983). The existence of these behaviorally distinct groups, while presenting numerous taxonomic challenges, also affords the opportunity for investigating in a comparative manner the evolution ofreproductive strategies in ants, as well as the relationship between social evolution and speciation.…”

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“…ants of the New World tropics and subtropics includes a profusion ofendemic and broadly distributed forms which are rather indistinct morphologically and whose taxonomic status thus remains unsettled (e.g., Creighton, 1930;Wilson, 1952;Brand et al, 1972;Buren, 1972;J. C. Trager, unpubl.…”

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Comparative Biochemical Genetics of Three Fire Ant Species in North America, with Special Reference to the Two Social Forms of Solenopsis invicta (Hymenoptera: Formicidae)

Ross¹,

Vargo²,

Fletcher³

1987

Evolution

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An electrophoretic study of the genetics of three fire ant species in North America was undertaken with the primary objective of further clarifying the genetic relationship between two social forms of Solenopsis invicta. Such social forms are common in many groups of ants and may, in some cases, represent significant intermediate stages in the speciation process. The monogyne and polygyne forms of S. invicta, while differing in a number of important biological traits, are genetically indistinguishable, in contrast to the substantial genetic differentiation observed between S. invicta and a second, closely related, introduced species, S. richteri. The native fire ant, S. geminata, is genetically the most distinct of the three species studied, in accord with its taxonomic placement in a different species complex. Hypotheses concerning the derivation of the polygyne form of S. invicta from the monogyne form which invoke their long-term reproductive isolation in South America and separate introductions to North America appear unfounded. Although S. invicta and S. richteri are known to hybridize in North America, our study provided no evidence of gene introgression between S. invicta and the native species, S. geminata, in areas where our samples were collected. Analyses of population structure in S. invicta failed to reveal significant differentiation of populations or local inbreeding. Levels of genetic diversity in the three species studied, although not significantly different, were in the order predicted from knowledge of the population biology and recent history of the taxa, with S. richteri exhibiting the least diversity, S. geminata the greatest, and S. invicta having an intermediate level.

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“…Other studies focus on the genetic and population biological aspects of the RESEARCH ARTICLE -ANTS 1 -Instituto Superior de Entomología Dr. A. Willink, Facultad de Ciencias Naturales e IML, San Miguel de Tucumán, Tucumán, Argentina 2 -Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá D.C., Colombia invading species (e.g. Ross & Trager, 1990) or summarize general taxonomic information (Wilson, 1952;Ettershank, 1966;Buren, 1972).…”

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confidence: 99%