. Bulletins of American paleontology. Alaskan ammonites. Pt. II: Westermann 161 50 \ \X K^. *'^ »^ 40 3 C£>X>^^ 30. 0-. 30 40 50 60 70 W7« Text-fig. 55. — Scatter with growth lines for relative umbilical width vs. relative whorl width (U%:W%) of Pseudotoites spp. from South America and Wide Bay (symbols as in Text-fig. 53). The combined parameters for 'coiling' and 'thickness' illustrate the specific dimensional differences which may or may not be significant. men from Espinazito Pass as the holotype. P. argentiniis is said to be "much more evoliite and larger than Gottsche's origin
. Bulletins of American paleontology. Alaskan ammonites. Pt. II: Westermann 161 50 \ \X K^. *'^ »^ 40 3 C£>X>^^ 30. 0-. 30 40 50 60 70 W7« Text-fig. 55. — Scatter with growth lines for relative umbilical width vs. relative whorl width (U%:W%) of Pseudotoites spp. from South America and Wide Bay (symbols as in Text-fig. 53). The combined parameters for 'coiling' and 'thickness' illustrate the specific dimensional differences which may or may not be significant. men from Espinazito Pass as the holotype. P. argentiniis is said to be "much more evoliite and larger than Gottsche's original", but neither description nor measurements were given. However, Jawor- ski's measurement and figures show that the phragmocone of his specimen has much broader whorls than the holotype and that Jaworski's specimen is indeed closely affiliated with P. transatlanti- cus (Tornquist) (Text-figs. 53,54). The inner whorls of the holo- type are unknown because the umbilicus was not developed. The affinities of the Wide Bay form with P. argeyitiniis, prob- ably known only in the holotype, can only be conjectured. The former is almost certainly more evolute (end phragmocone U c. 42-477o '^-y- c. 35%, aperture U 45-50%, vs. 39%). Among the Aus- tralian species, P. leirharti is most closely affiliated but dis- tinguished by less evolute whorls with denser primaries and wider spaced 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. ]
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