Diplomoceras

Diplomoceras
Temporal range: Late Cretaceous, Campanian–Maastrichtian
Life restoration of Diplomoceras around Aristonectes
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
Suborder: †Ancyloceratina
Family: †Diplomoceratidae
Genus: †Diplomoceras
Hyatt, 1900
Species[1]
  • †D. cascadense Anderson, 1958
  • †D. cylindraceum (DeFrance, 1816)
  • †D. jimboi Anderson, 1958
  • †D. mercedense Anderson, 1958
  • †D. mustangense Anderson, 1958
  • †D. oshaughnessyi Anderson, 1958
  • †D. vernaculare Anderson, 1958
Synonyms

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]

  1. ^ F. M. Anderson. (1958). Upper Cretaceous of the Pacific Coast. Geological Society of America Memoir 71:1-378
  2. ^ Spath L. F. (1926). A Monograph of the Ammonoidea of the Gault; Part VI. Palaeontographical Society London
  3. ^ 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.
  4. ^ Paleobiology database
  5. ^ 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.
  6. ^ 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.
  7. ^ "Giant Heteromorph Ammonite". Paleontological Research Institution. 2023-07-25.
  8. ^ 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.
  9. ^ 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.