A giant baculite from the Upper Campanian and Lower Maastrichtian of the Western Interior
Pseudobaculites natosini (Robinson, 1945) is the largest baculite (straight or nearly straight ammonite) known from the Western Interior of Canada and the United States. The species is characterized by its high expansion rate, compressed whorl section, and deeply incised suture that has the terminal...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1994
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| Summary: | Pseudobaculites natosini (Robinson, 1945) is the largest baculite (straight or nearly straight ammonite) known from the Western Interior of Canada and the United States. The species is characterized by its high expansion rate, compressed whorl section, and deeply incised suture that has the terminal branches of the lateral lobe constricted at their bases. Occurrences of the species are in the upper Campanian zone of Baculites jenseni and in the lower Maastrichtian zone of B. eliasi in Montana, Wyoming, and Colorado. The known occurrence in Saskatchewan has not been placed in the baculitid sequence. -Authors |
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