Examining other aspects of model fit, including conducting ML analyses without correcting for acquisition bias (i.e.XVLQJWKH&)1īPRGHO, also resulted in similar topologies. These equivocal results are most likely to reflect the limited phylogenetic information in gap data matrices, even ones as large as that analyzed here. This suggests that it will be necessary to examine even larger data matrices to determine whether either analytical approach provides an adequate fit to the underlying process of indel evolution and to establish the impact of these methods upon topology.