Stratum.black
Discoscaphites — Discoscaphites
Discoscaphites — Wilson44691, Wikimedia Commons, Public domain (US)

Ammonoid

Discoscaphites

Scaphite ammonite

Discoscaphites is the last scaphitid, a Maastrichtian ammonite that survived to the K–Pg boundary and is found in the Fox Hills, Ripley, Coon Creek and New Jersey greensands, often with its nacreous shell intact. Its nodose, compressed whorls distinguish it from Hoploscaphites. It is one of the few ammonites whose extinction can be tied directly to the impact.

PhylumMollusca
ClassCephalopoda
OrderAmmonitida
FamilyScaphitidae
GroupAmmonoid
Rank (PBDB)genus· Paleobiology Database
Author(Meek 1870)· Paleobiology Database
Classification (PBDB)Mollusca › Cephalopoda › Ammonitida › Scaphitidae· Paleobiology Database
Range (PBDB)85.7–66 Ma· Paleobiology Database
PBDB occurrences207· Paleobiology Database

Photographs

Discoscaphites — Discoscaphites conradi (NHMUK PI CA 5818)
Discoscaphites conradi (NHMUK PI CA 5818) — © The Trustees of the Natural History Museum, London, Natural History Museum (London) Data Portal, CC BY 4.0
Discoscaphites — Discoscaphites rossi (NHMUK PI CA 5284)
Discoscaphites rossi (NHMUK PI CA 5284) — © The Trustees of the Natural History Museum, London, Natural History Museum (London) Data Portal, CC BY 4.0
Discoscaphites — Discoscaphites gulosus (NHMUK PI CA 5283)
Discoscaphites gulosus (NHMUK PI CA 5283) — © The Trustees of the Natural History Museum, London, Natural History Museum (London) Data Portal, CC BY 4.0

Age

Formations

Elsewhere

Cite this article

Stratum Study. "Discoscaphites" (Taxon). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/taxa/discoscaphites. Accessed 2026-09-20.

BibTeX · CSL-JSON

@misc{stratum-discoscaphites,
  title        = {Discoscaphites},
  author       = {{Stratum Study}},
  howpublished = {\url{https://stratum.black/study/taxa/discoscaphites}},
  year         = {2026},
  note         = {Taxon article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, pbdb, wikidata, commons, nhm. Accessed 2026-09-20.}
}

Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.