Discoscaphites

Discoscaphites is an extinct genus of ammonite. This genus may have been one of the few to have briefly survived the K-Pg mass extinction.

Discoscaphites
Temporal range: Campanian to Danian
Discoscaphites iris,
Owl Creek Formation (Upper Cretaceous), Ripley, Mississippi.
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
Suborder: †Ancyloceratina
Family: †Scaphitidae
Subfamily: †Scaphitinae
Genus: †Discoscaphites
Meek, 1870
Species[1]
  • D. conradi
  • D. gulosus
  • D. rossi

Distributions

Cretaceous of Greenland, Alabama, Arkansas, California, Colorado, Kansas, Maryland, Mississippi, Missouri, New Jersey, South Dakota, Tennessee, Texas, Wyoming,[1] and North Carolina.[2] Discoscaphites is present in the famous Pinna Layer of the Tinton Formation of New Jersey (above the iridium anomaly), with even possible records in the layer above, along with Eubaculites.[3] some researchers prefer a conservative interpretation when dating the Pinna Layer, the other remains still suggest Discoscaphites was a K-Pg survivor, albeit restricted to 65 Ma.[4]

References
  1. "Paleobiology Database - Discoscaphites". Retrieved 17 December 2021.
  2. Chandler and Timmerman, Richard and John (2014). Fossil Mollusks - Volume II of IV. North Carolina: North Carolina Fossil Club. p. 20. Archived from the original on 2016-03-15. Retrieved 2016-05-16.
  3. Landman, Neil H.; Garb, Matthew P.; Rovelli, Remy; Ebel, Denton S.; Edwards, Lucy E. (December 2012). "Short-Term Survival of Ammonites in New Jersey After the End-Cretaceous Bolide Impact". Acta Palaeontologica Polonica. 57 (4): 703–715. doi:10.4202/app.2011.0068. ISSN 0567-7920. S2CID 55646492.
  4. Landman, Neil H.; Goolaerts, Stijn; Jagt, John W.M.; Jagt-Yazykova, Elena A.; Machalski, Marcin (2015), Klug, Christian; Korn, Dieter; De Baets, Kenneth; Kruta, Isabelle (eds.), "Ammonites on the Brink of Extinction: Diversity, Abundance, and Ecology of the Order Ammonoidea at the Cretaceous/Paleogene (K/Pg) Boundary", Ammonoid Paleobiology: From macroevolution to paleogeography, Dordrecht: Springer Netherlands, vol. 44, pp. 497–553, doi:10.1007/978-94-017-9633-0_19, ISBN 978-94-017-9632-3, retrieved 2021-10-27


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