Abstract of Smith, G. R. 1990. Homology in morphometrics and phylogenetics, pp. 325-339. In F.J. Rohlf and F.L. Bookstein (eds.) Proc. Michigan Morphometrics Workshop. Special Publ. 2 Univ. Michigan Mus. Zool., Ann Arbor, 380 pp.

Traditional homology (based on position, tissue, embryology) is now testable with taxic homology (shared synapomorphies diagnostic of monophyletic groups). The taxic definition of homology does not negate either the traditional or transitional uses of the concept.