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...aphically.<ref name=ch17r83>Sweet, W. C., 1988, The Conodonta: morphology, taxonomy, paleoecology, and evolutionary history of a long-extinct animal phylum: Ox Individual conodonts vary greatly in morphology, and taxonomy was originally based on the morphology of these individual specimens. While

...repina_1993>Palmer, A. R., and L. N. Repina, 1993, Through a glass darkly: Taxonomy, phylogeny, and biostratigraphy of the Olenellina: Kansas, University of Ka ...roup (Ordovician, Oklahoma) cryptolithinid trilobites: Biostratigraphy and taxonomy: Journal of Paleontology, v. 65, p. 919–935.</ref>), no interregional zon