. Bulletins of American paleontology. Alaskan ammonites, Pt. II: Westermann 25 l:^ W. AUSTRALIA. â¡ subgenera â species Text-fig. 10. â Cosmopolitan affinities of the principle ammonite assem- blages of the S. soiverbyi Zone of Wide Bay, possibly indicating migration routes; based on numbers of common subgenera and species. Note that the af- finities between southern Alaska and Western Australia â Indonesia could be accounted for by migration via Europe and South America, and that the as- sumption of continental drift would alter the relative position of the Australo- Indonesian area significa
. Bulletins of American paleontology. Alaskan ammonites, Pt. II: Westermann 25 l:^ W. AUSTRALIA. â¡ subgenera â species Text-fig. 10. â Cosmopolitan affinities of the principle ammonite assem- blages of the S. soiverbyi Zone of Wide Bay, possibly indicating migration routes; based on numbers of common subgenera and species. Note that the af- finities between southern Alaska and Western Australia â Indonesia could be accounted for by migration via Europe and South America, and that the as- sumption of continental drift would alter the relative position of the Australo- Indonesian area significantly. Witchellia ("Zugophorites") or possibly partly to Sonninia (Eiiho- ploceras), resembling the species from Lake Minnewanka and evo- lute Witchellia from the middle part of the northwest European S. soiverbyi Zone. Guhsania bella and "Sonninia Hansoni" could come from a higher level, the O. sauzei Zone. "Guhsania ram- ata" is known from a single small fragment only, resembling G. bella. The long known poorly preserved small "Devils Point" as- semblage (Whiteaves, 1889) representing the only good evidence. 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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