Pertaining to, or involving, taxonomy, or the laws and principles of classification; classificatory.

pertaining to the classification of organisms in to categories based on common characteristics

of or pertaining to the systematic classification of living organisms

based on the principles of classification.

pertaining to the classification of organisms on the basis of the evolutionary relationships. tectonics: referring to the large-scale structural elements of a region and the processes by which they formed (e.g; deformation from differential stresses due to plate motion)