. Bulletins of American paleontology. 240 Bulletin 256 Classification of Fontannesia.—lt is evident from the discussion above that the genus resembles the Grammoceratinae of the Hildo- ceratidae family more closely than the Sonniniidae in which it has been placed invariably. The principal reason for this classi- fication of Fontannesia has undoubtedly been its stratigraphic oc- currence in the Sonfiinia soxverbyi Zone where it is accompanied by the first "true" sonniniids, and the almost entire absence of the Hildoceratidae, except for the distinct Tmetoceras and the scarce Astheuoce
. Bulletins of American paleontology. 240 Bulletin 256 Classification of Fontannesia.—lt is evident from the discussion above that the genus resembles the Grammoceratinae of the Hildo- ceratidae family more closely than the Sonniniidae in which it has been placed invariably. The principal reason for this classi- fication of Fontannesia has undoubtedly been its stratigraphic oc- currence in the Sonfiinia soxverbyi Zone where it is accompanied by the first "true" sonniniids, and the almost entire absence of the Hildoceratidae, except for the distinct Tmetoceras and the scarce Astheuoceras in tiie Aalenian of Europe (cf. Treatise, p. L 254). It. 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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