Clymeniida
Clymeniida is an order of ammonoid cephalopods from the Upper Devonian characterized by having an unusual dorsal siphuncle. They measured about 4 cm (1.6 in) in diameter and are most common in Europe, North Africa, and South China but are known from North America (New York, Ohio, Oklahoma, and Utah) and Australia (New South Wales) as well.
| Clymeniida Temporal range: | |
|---|---|
| Clymenia laevigata | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Clymeniida Hyatt, 1884 |
| Suborders | |
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