Holcodiscus

Holcodiscus is an extinct ammonite genus placed in the family Holcodiscidae. Species in this genus were fast-moving nektonic carnivores.^[2] The type species of the genus is Ammonites caillaudianus.^[2]

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.^[3]

Source:^[2]

• Holcodiscus caillaudianus d'Orbigny 1850
• Holcodiscus camelinusd'Orbigny 1850
• Holcodiscus hauthaliPaulcke 1907
• Holcodiscus tenuistriatus Paulcke 1907

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.^[2]

• 
  Holcodiscus mediocostatusTzankov, 1935, Barremian, Razgrad, Cr1 1716 (Coll.V. Tzankov) at the Sofia University Museum of Paleontology and Historical Geology

• "Holcodiscus". mindat.org. Retrieved 30 December 2021.
• "Holcodiscus". Encyclopedia of Life (EOL). Retrieved 30 December 2021.
• Wright, Claud William; with John Hannes Callomon and M.K. Howarth (1996). Roger L. Kaesler (ed.). Mollusca 4 Revised, Cretaceous Ammonoidea in Treatise on Invertebrate Paleontology Part L. Boulder, Colorado and Lawrence, Kansas: The Geological Society of America & University of Kansas Press. p. 48.{{cite book}}: CS1 maint: varios nombres: lista de autores ( enlace )
• Arkell, WJ ; Furnish, WM; Kummel, Bernhard; Miller, AK; Moore, RC; Schindewolf, OH (1957). "Parte L, Mollusca 4: Cephalopoda, Ammonoidea". En Raymond C. Moore (ed.). Tratado de paleontología de invertebrados . Geological Society of America y University of Kansas Press. pág. L371 . ISBN  978-0-8137-3012-7– vía Internet Archive .{{cite book}}: Incompatibilidad de ISBN/Fecha ( ayuda )