Hoploscaphites

Hoploscaphites Temporal range: Upper Cretaceous
Hoploscaphites; Pierre Shale. South Dakota
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Suborder:	†Ancyloceratina
Family:	†Scaphitidae
Subfamily:	†Scaphitinae
Genus:	†Hoploscaphites Nowak, 1911
Species
See text

Hoploscaphites is an extinct ammonite genus from the Upper Cretaceous, included in the family Scaphitidae.

Morphology

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.

Distribution

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).

Species

A number of species have been described in the genus:

• H. angmartussutensis Birkelund, 1965
• H. birkelundae Landman & Waage, 1993
• H. comprimus (Owen, 1852)
• H. constrictus (Sowerby, 1817)
• H. indicus (Forbes, 1846)
• H. landesi Riccardi, 1983
• H. melloi Landman & Waage, 1993
• H. nicolletii (Morton, 1842)
• H. pumilis Stephenson, 1941
• H. quiriquinensis Wilckens, 1904
• H. tenuistriatus (Kner, 1848)
• H. vistulensis Blaszkiewicz, 1980
• H. youngi Larson, 2016

Further reading

• 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