<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Page,Roderic D. M.</style></author><author><style face="normal" font="default" size="100%">Lee,Patricia L. M.</style></author><author><style face="normal" font="default" size="100%">Becher,S. Anette</style></author><author><style face="normal" font="default" size="100%">Griffiths,Richard</style></author><author><style face="normal" font="default" size="100%">Clayton,Dale H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">A different tempo of mitochondrial evolution in birds and their parasitic lice</style></title><secondary-title><style face="normal" font="default" size="100%">Molecular Phylogenetics and Evolution</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1998</style></year><pub-dates><date><style  face="normal" font="default" size="100%">1998</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.phthiraptera.info/sites/phthiraptera.info/files/0155.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">9</style></volume><pages><style face="normal" font="default" size="100%">276 - 293</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A phylogeny for the lice (Insecta: Phthiraptera: genus Dennyus) parasitic on swiftlets (Aves: Collocalliinae) was constructed based on mitochondrial cytochrome b DNA sequences. This phylogeny is congruent with previous phenetic analyses of morphometric data for the lice. Comparison with a prevoius obtained phylogeny for the hosts indicates some degree of cospeciation. These cospeciation rates are used to compare relative rates of evolution in the birds and their lice for the same segment of cytochrome b gene. Cytochrome b is evolving 2-3 times more rapidly in the lice than the bird, and louse cytochrome b is highly divergent compared to most other insects. Although generation time has been suggested as an explanation for the disparity in evolutionary rates between lice and their hosts, we suggest that the small effective population sizes of lice coupled with founder events occuring during transmission to new host individuals may be an important factor.&lt;/p&gt;
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