Muramotoceras was an unusual genus of heteromorphic ammonite.[2] It was known only from Japan until researchers reported in 2001 that the genus was present in Alaska's Matanuska Formation as well.[2] Its remains likely date to the middle Turonian (from 89.8 to 93.9 million years ago) in both areas.[2] Subsequently it was also described from the Santonian Gosau Group (Austria).[3]
| Muramotoceras Temporal range:
| |
|---|---|
| |
| Fossil of Muramotoceras from Upper Cretaceous of Japan | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Suborder: | †Ancyloceratina |
| Family: | †Nostoceratidae |
| Genus: | †Muramotoceras Matsumoto, 1967[1] |
See also
editFootnotes
edit- ^ Matsumoto, T., 1967. Evolution of the Nostoceratidae (Cretaceous Hetermorph Ammonoids) Fac. Sci. Kyushu Univ. Mem. ser. D, geology 18 (2):331-347.
- ^ a b c "Age of the Bone-Bearing Unit," Pasche and May (2001); page 220.
- ^ Summesberger, H.; Kennedy, W. J.; Skoumal, P. (2017). "Early and middle Santonian Cephalopods from the Gosau Group (Upper Cretaceous, Austria) 2. Heteromorph Ammonoidea" (PDF). Abhandlungen der Geologischen Bundesanstalt in Wien. 71: 101–149.
References
edit- Ann D. Pasch & Kevin C. May. (2001). "Taphonomy and paleoenvironment of a hadrosaur (Dinosauria) from the Matanuska Formation (Turonian) in South-Central Alaska". In Darren H. Tanke & Kenneth Carpenter (ed.). Mesozoic Vertebrate Life. Indiana University Press. pp. 219–236. ISBN 978-0-253-33907-2.
External links
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