TY - JOUR
T1 - Phylogenetics of Social Behavior in Australian Gall-Forming Thrips
T2 - Evidence from Mitochondrial DNA Sequence, Adult Morphology and Behavior, and Gall Morphology
AU - Crespi, B. J.
AU - Carmean, D. A.
AU - Mound, L. A.
AU - Worobey, M.
AU - Morris, D.
N1 - Funding Information:
We are grateful to A. Brower for providing us with unpublished manuscripts and to A. Brower, R. De Salle, B. Kranz, B. Maslin, M. Schwarz, and four anonymous reviewers for helpful comments and discussion. We thank the Natural Science and Engineering Research Council of Canada and the National Geographic Society for financial support and R. Crozier, B. Maslin, M. Schwarz, and CSIRO Entomology for logistic support and hospitality.
PY - 1998/2
Y1 - 1998/2
N2 - Six species of Australian gall-forming thrips (Insecta: Thysanoptera) onAcaciaexhibit soldier castes, individuals with reduced wings and enlarged forelegs that defend their gall against interspecific invaders. We used data from two mitochondrial genes (cytochrome oxidase I and 16S rDNA), adult morphology and behavior, and gall morphology to infer a phylogeny forAcaciagall-forming thrips with and without soldiers, and we used this phylogeny to evaluate hypotheses concerning soldier evolution. Phylogenies inferred from each data set analyzed separately yielded large numbers of most-parsimonious trees and weak support for most nodes. However, when analyzed together the data sets complemented and reinforced one another in such a way as to yield a well-resolved phylogeny. Our phylogeny implies that soldiers originated once or twice early in the history of this clade, that soldiers were lost once or twice, and that soldiers evolved from winged dispersers rather than from nonsoldier within-gall reproductive offspring of foundresses. The phylogeny also provides evidence for long-term morphological stasis, an ancient split between eastern and western gall thrips species, and a high degree of conservatism in host-plant affiliations.
AB - Six species of Australian gall-forming thrips (Insecta: Thysanoptera) onAcaciaexhibit soldier castes, individuals with reduced wings and enlarged forelegs that defend their gall against interspecific invaders. We used data from two mitochondrial genes (cytochrome oxidase I and 16S rDNA), adult morphology and behavior, and gall morphology to infer a phylogeny forAcaciagall-forming thrips with and without soldiers, and we used this phylogeny to evaluate hypotheses concerning soldier evolution. Phylogenies inferred from each data set analyzed separately yielded large numbers of most-parsimonious trees and weak support for most nodes. However, when analyzed together the data sets complemented and reinforced one another in such a way as to yield a well-resolved phylogeny. Our phylogeny implies that soldiers originated once or twice early in the history of this clade, that soldiers were lost once or twice, and that soldiers evolved from winged dispersers rather than from nonsoldier within-gall reproductive offspring of foundresses. The phylogeny also provides evidence for long-term morphological stasis, an ancient split between eastern and western gall thrips species, and a high degree of conservatism in host-plant affiliations.
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U2 - 10.1006/mpev.1997.0449
DO - 10.1006/mpev.1997.0449
M3 - Article
C2 - 9479705
AN - SCOPUS:0031992557
SN - 1055-7903
VL - 9
SP - 163
EP - 180
JO - Molecular Phylogenetics and Evolution
JF - Molecular Phylogenetics and Evolution
IS - 1
ER -