Holcodiscus Explained

Holcodiscus is an extinct ammonite genus placed in the family Holcodiscidae. Species in this genus were fast-moving nektonic carnivores. The type species of the genus is Ammonites caillaudianus.

Description

Circular to rectangular whorl section; fine, low, straight or flexuous simple or branched ribs, periodically truncated by thin, high, enlarged ribs bearing lateral and ventrolateral tubercles; inner whorls tending to have depressed whorl section and to resemble Olcostephanus.^[1]

Species

Source:

Holcodiscus caillaudianus d'Orbigny 1850
Holcodiscus camelinus d'Orbigny 1850
Holcodiscus hauthali Paulcke 1907
Holcodiscus tenuistriatus Paulcke 1907

Distribution

Fossils of species within this genus have been found in the Cretaceous sediments of Austria, Bulgaria, Chile, Colombia, Czech Republic, Slovakia, France, Italy, Morocco, Spain and Russia.

External links

Web site: Holcodiscus . mindat.org . 30 December 2021.
Web site: Holcodiscus . Encyclopedia of Life (EOL) . 30 December 2021.
Book: [[Claud William Wright| Wright]], Claud William; with John Hannes Callomon and M.K. Howarth . 1996 . Mollusca 4 Revised, Cretaceous Ammonoidea in Treatise on Invertebrate Paleontology Part L . Roger L. Kaesler . The Geological Society of America & University of Kansas Press. Boulder, Colorado and Lawrence, Kansas . registration . 48.
Book: . Furnish, W. M. . Kummel, Bernhard . Miller, A.K. . Moore, R.C. . Schindewolf, O.H. . 1957 . Part L, Mollusca 4: Cephalopoda, Ammonoidea . Treatise on Invertebrate Paleontology . Geological Society of America and University of Kansas Press . Raymond C. Moore . Raymond Cecil Moore . registration . L371 . 978-0-8137-3012-7 . Internet Archive.

Notes and References

Book: Mollusca 4 Revised, Cretaceous Ammonoidea, in Treatise on Invertebrate Paleontology, Part L . Wright, C. W. with J.H. Callomon and M.K. Howarth . 1996 . Roger L. Kaesler . Boulder, Colorado Lawrence, Kansas . The Geological Society of America & University of Kansas Press. 4. 48 . 61988855.