An excellent example of this shuffling is the change ... a final hurdle in the standard practice of taxonomy and phylogeny: biology does not always adhere to our simplistic models.

Deane Bowers - 1998 Effects of Soil Nitrogen Reduction on Nonnative Plants in Restored Grasslands - K.J. Reever Morghan & T. R. Seastedt - 1999 Phylogeny of hammerhead sharks (Family Sphyrnidae) ...