. Bulletins of American paleontology. Leaf Shape Models: MacLeod 233 06 A Anenuate r^l « Acute Rounded-/ -^ c y . J (// Emarginale . 05 07 II 13 15 -04 02 04 Eigenshape I Eigenshape 3 Text-tigure 17.—Subregions ot the leat-apex shape intermediacy space that coirespond to the character states described by Wolfe (1993). Once these regions have been defined and extended into higher dimensions so that the represent hypervolunies rather than planar regions, they can be used to understand the geometry ot shape character-state variation. character classifica
. Bulletins of American paleontology. Leaf Shape Models: MacLeod 233 06 A Anenuate r^l « Acute Rounded-/ -^ c y . J (// Emarginale . 05 07 II 13 15 -04 02 04 Eigenshape I Eigenshape 3 Text-tigure 17.—Subregions ot the leat-apex shape intermediacy space that coirespond to the character states described by Wolfe (1993). Once these regions have been defined and extended into higher dimensions so that the represent hypervolunies rather than planar regions, they can be used to understand the geometry ot shape character-state variation. character classifications advocated by these (and other) authors remained illusive. All possible shape alterna- tives were not systematically considered, much less illustrated. Indeed, by relying on traditional definitions of leaf characters—and concepts as to what constitutes a nameable moiphological feature—all three classifi- cations became hostages to ambiguity in several sens- es. This ambiguity manifests itself in: (1) different types of morphological relationships being used to rec- ognize alternative states of the same character ( Wolfe's ""lobateness" character discussed above), (2) different descriptive terms and definitions being ap- plied to the same morphological feature (, see Hickey's. 1973 "lobate margin" and "crenulate mar- A. 0 1 r . i Ak 1 -0?- \ ). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
Size: 1632px × 1530px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorpaleonto, bookcentury1800, bookdecade1890, bookyear1895
