| Muramotoceras Temporal range: Turonian |
|
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Order: | Ammonitida |
| Family: | Nostoceratidae |
| Genus: | Muramotoceras |
Muramotoceras was an unusual genus of heteromorphic ammonite.[1] It was known only from Japan until researchers reported in 2001 that the genus was present in Alaska's Matanuska Formation as well.[1] Its remains likely date to the middle Turonian in both areas.[1]