The Upper Cretaceous dimorphic pachydiscid ammonite Menuites in the Western Interior of the United States
Highly dimorphic pachydiscid ammonites are fairly abundant in Montana, South Dakota, Wyoming, and Colorado, and a few specimens are known from Utah and New Mexico. Two chronologic species are recognized, each represented by small adults (microconchs) and large adults (macroconchs). Microconchs have...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1993
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