ABSTRACT
P-symbionts: a touchstone of molecular phylogenetics ...................................................8 Nonhomogeneous models ...............................................................................................8 Multigene approach........................................................................................................ 10 Genome structure ........................................................................................................... 11 Evolutionary implications of P-symbionts monophyly/polyphyly ......................... 12
Coevolutionary reconstructions in symbiotic associations .......................................... 13 Tree congruence .............................................................................................................. 13 Compatibility of host and symbiont data ................................................................... 14 Tree condence ............................................................................................................... 15 Molecular clock and calibration of evolutionary rates .............................................. 16 Specicity without coevolution .................................................................................... 16
Low-level phylogeny ........................................................................................................... 18 Intragenomic heterogeneity .......................................................................................... 19 Diversity and sample ..................................................................................................... 20
Conclusion ............................................................................................................................22 Acknowledgments ...............................................................................................................22 References .............................................................................................................................23
