| Abstract: | Didymoceras puebloense nov. sp. is described from the upper Campanian zones of Didymoceras nebrascense and Didymoceras stevensoni in Pueblo and Pitkin Counties, Colorado, and Weston County, Wyoming in the United States Western Interior. The species is characterized by a middle helical growth stage in which the successive whorls are widely separated followed by a terminal pendant U-shaped sector of the adult body chamber. Ornament is of distant, narrow bituberculate ribs usually separated by a nontuberculate rib. Widely separated poorly-defined constrictions with associated collar ribs are occasionally present. The style of coiling in middle and later growth resembles that of those growth stages in upper Campanian Didymoceras, whereas the ornament recalls that of middle Campanian representatives of the genus in the Western Interior. |
| Genre: | Article |
| ProdID: | 70019564 |
| Citation Author: | Cobban, W. A.; Kennedy, W. J.; Scott, G. R. |
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| Citation End Page: | 230 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geobios |
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| Citation Number Of Pages: | 7 |
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| Citation Search Results Text: | Didymoceras puebloense, a new species of heteromorph ammonite from the Upper Campanian of Colorado and Wyoming; 1997; Article; Journal; Geobios; Cobban, W. A.; Kennedy, W. J.; Scott, G. R. |
| Citation Start Page: | 224 |
| Citation Volume: | 30 |
| Citation Year: | 1997 |
| Type: | citation/reference |
| Text: | Didymoceras puebloense, a new species of heteromorph ammonite from the Upper Campanian of Colorado and Wyoming; 1997; Article; Journal; Geobios; Cobban, W. A.; Kennedy, W. J.; Scott, G. R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1997 00:00 -0600 |
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