Diplomoceras is a genus of ammonites included in the family Diplomoceratidae.[2] Fossils of species within this genus have been found in the Late Cretaceous sediments (age range: Campanian-Maastrichtian).[3][4] D. maximum had coiled shell length about 1.5 m (4.9 ft), uncoiled shell being 3 m (9.8 ft) to over 4 m (13 ft), with body chamber around 2 m (6.6 ft).[5][6][7] Some partial specimens may belong to shell with length around 1.7 m (5.6 ft).[8] Studies of Diplomoceras suggest that members of this genus could reach lifespans of over 200 years.[9]
| Diplomoceras Temporal range: Late Cretaceous,
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| Life restoration of Diplomoceras around Aristonectes | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Suborder: | †Ancyloceratina |
| Family: | †Diplomoceratidae |
| Genus: | †Diplomoceras Hyatt, 1900 |
| Species[1] | |
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| Synonyms | |
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References
edit- ^ F. M. Anderson. (1958). Upper Cretaceous of the Pacific Coast. Geological Society of America Memoir 71:1-378
- ^ Spath L. F. (1926). A Monograph of the Ammonoidea of the Gault; Part VI. Palaeontographical Society London
- ^ Docho Dochev, Lubomir Metodiev (December 2016). "New record of Diplomoceras cylindraceum (Defrance, 1816) from the Maastrichtian of the Western Fore-Balkan (Bulgaria)". Geologica Balcanica. 45: 33–45. doi:10.52321/GeolBalc.45.0.33.
- ^ Paleobiology database
- ^ Zinsmeister, WJ; Oleinik, AE (1995). "Discovery of a remarkably complete specimen of the giant cephalopod Diplomoceras maximum from the Late Cretaceous of Seymour Island, Antarctica". Antarctic Journal of the United States.
- ^ Syracuse University; Artruc, Emily G.; Ivany, Linda C. (2016). "GROWTH RATE AND ECOLOGY OF THE GIANT HETEROMORPH AMMONITE DIPLOMOCERAS MAXIMUM USING STABLE ISOTOPES OF ACCRETIONARY SHELL CARBONATE". Geological Society of America Abstracts with Programs. Vol. 48, No. 2. Geological Society of America Abstracts with Programs. doi:10.1130/abs/2016NE-272500.
- ^ "Giant Heteromorph Ammonite". Paleontological Research Institution. 2023-07-25.
- ^ Masukawa, Genya; Ando, Hisao (2018-11-01). "Late Campanian–early Maastrichtian heteromorph-dominated ammonoid assemblages of the Nakaminato Group, central Honshu, Japan: biostratigraphic and paleontological implications". Cretaceous Research. 91: 362–381. Bibcode:2018CrRes..91..362M. doi:10.1016/j.cretres.2018.06.018. ISSN 0195-6671.
- ^ Syracuse University; Ivany, Linda C.; Artruc, Emily G. (2020). "LIFESPAN, GROWTH RATE, AND ECOLOGY OF A GIANT HETEROMORPH AMMONITE FROM ANTARCTICA". GSA Connects Online 2020. doi:10.1130/abs/2020AM-357534.