. Bulletins of American paleontology. 268 Bulletin 277. Text-fig. 30. — Geographic distribution of Lower Tithonian and Kim- meridgian ammonite genera known from the Sierra Catorce. Areas of maximal marine transgression are dotted. (Distribution of continents modified after Wilson, 1963; Smith and Hallam, 1970). glochiceras", Pseudoinvoluticeras, and Mazapilites minor ele- ments. There follow the rich Kossmatia-Durangites-Corongoceras assemblage and, finally, the Substeueroceras-Berriasella assemblage. 7. A comparison with the assemblages from northern Mexico in- dictates general agree
. Bulletins of American paleontology. 268 Bulletin 277. Text-fig. 30. — Geographic distribution of Lower Tithonian and Kim- meridgian ammonite genera known from the Sierra Catorce. Areas of maximal marine transgression are dotted. (Distribution of continents modified after Wilson, 1963; Smith and Hallam, 1970). glochiceras", Pseudoinvoluticeras, and Mazapilites minor ele- ments. There follow the rich Kossmatia-Durangites-Corongoceras assemblage and, finally, the Substeueroceras-Berriasella assemblage. 7. A comparison with the assemblages from northern Mexico in- dictates general agreement with a few minor anomalies; the most important is the impoverishment in involute compressed forms like. 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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