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Temporal range: Upper Cretaceous
Hoploscaphites ammonite.jpg
'Hoploscaphites; Pierre Shale. South Dakota
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Family: Scaphitidae
Genus: Hoploscaphites
Nowack, 1911
  • H. angmartussutensis
  • H. birkelundae
  • H. constrictus
  • H. pumilis
  • H. tenuistriatus
  • H. vistulensis

Hoploscaphites is an extinct ammonite genus from the Upper Cretaceous, included in the family Scaphitidae. It is considered by some to be a subgenus of Scaphites. Like Scaphites the shell of Hoploscaphites is involute with the final whorl projecting forward and curved back on itself. Shells vary from compressed to inflated with convex sides. Tubercles normally present may be sparse or absent.


Fossils of Hoploscaphites have been found in Antarctica, Austria, Belgium, Bulgaria, Canada (Alberta, Saskatchewan), Chile, Denmark, France, Germany, Greenland, India, the Netherlands, Turkmenistan, Ukraine and the United States (Arkansas, Colorado, Delaware, Kansas, New Jersey, New Mexico, North Dakota, South Dakota, Texas, Wyoming).[1]


Further reading[edit]

  • Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press. 
  • Cobban, W.A. 1974. Ammonites from the Navesink Formation at Atlantic Highlands, New Jersey; USGS Prof Paper 845