| Calycoceras Temporal range: Cretaceous
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|---|---|
_spinosa.JPG)
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| Calycoceras asiaticum spinosum, Late Cretaceous (Cenomanian) from Madagascar, abt. 94 Mya | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Acanthoceratidae |
| Subfamily: | †Acanthoceratinae |
| Genus: | †Calycoceras Hyatt, 1900 |
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| Synonyms | |
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Calycoceras is an extinct genus of cephalopods belonging to the subclass Ammonoidea and family Acanthoceratidae that lived during the Cenomanian stage of the Late Cretaceous, 100-94 Mya.[1] Their shells had ornate ribs.[2]
- ^ Sepkoski, Jack Sepkoski's Online Genus Database – Cephalopodes
- ^ Ammonites