Taxon, Vol. 18, No. 2, Smithsonian Summer Institute in Systematics 1968, Part 2 (Apr., 1969), pp. 204-212 (9 pages) In response to skeptics who feel that the contribution of paleobotany to phylogeny ...

Biological classification aims at establishing ordering systems for organisms. Principles of classification, however, differ in their criteria and in their information content. Cladistic ...