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Hoploscaphites

genus of molluscs (fossil)

Specimen drawers, botanical folios and brass scientific instruments under study light
Science and natureInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJun 23, 2026
Entity authorityQ5901121 ↗
Source-derived summary

Hoploscaphites is an extinct ammonite genus from the Upper Cretaceous and the Lower Paleocene, 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 curving 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). Of the few genera of ammonites which are thought to have survived the K-Pg extinction event into the Danian period (65-61 Myr) of the Paleogene, Hoploscaphites is the most widely and reliably recorded, with finds in Denmark, the Netherlands and the United States, and a possible record in Turkmenistan.

Species

A number of species have been described in the genus:

H. angmartussutensis Birkelund, 1965

H. birkelundae Landman & Waage, 1993

H. crassus (Coryell & Salmon), 1934

H. comprimus (Owen, 1852)

H. constrictus (Sowerby, 1817)

H. criptonodosus Riccardi, (1983)

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

References

Further reading

Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4.

Editorial summary

The public source identifies “Hoploscaphites” as genus of molluscs (fossil). This brief keeps that definition visible, then builds a research path around Hoploscaphites, genus and molluscs.

Editorial reviewA practical orientation to terminology and classification, particularly when read beside dated observations, specimens or technical literature. The current lead gives the account dated anchors—1965, 1993, 1934, 1852—that can be checked directly. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with Hoploscaphites, genus and molluscs providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “Hoploscaphites”, the useful work is to connect “genus of molluscs (fossil)” to the records capable of establishing context and consequence.

Evidence profile

Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Jun 23, 2026. The linked authority identifier is Q5901121. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1965, 1993, 1934 and 1852.

Critical limits

Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.

Best used for
  • Current terminology
  • Classification context
  • Finding cited technical literature
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  2. Expand the search: follow Hoploscaphites primary sources, Hoploscaphites archive and Hoploscaphites research across catalogues and specialist indexes.
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Source & attribution

This entry incorporates text from “Hoploscaphites” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.