| Clymeniida Temporal range:
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|---|---|
| |
| Clymenia laevigata | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Clymeniida Hyatt, 1884 |
| Suborders | |
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.[1]
- ^ Dieter, Korn; Kenneth, De Baets (2015), Klug, Christian; Korn, Dieter; De Baets, Kenneth; Kruta, Isabelle (eds.), "Biogeography of Paleozoic Ammonoids", Ammonoid Paleobiology: From macroevolution to paleogeography, vol. 44, Dordrecht: Springer Netherlands, pp. 145–161, doi:10.1007/978-94-017-9633-0_6, ISBN 978-94-017-9632-3, retrieved 2023-07-10