Moderately involute with rounded, rectangular, or depressed whorl section; straight or sinuous, fine, dense ribs typically continuing over venter and may be periodically truncated by oblique, enlarged ribs, with or without umbilical, lateral and ventrolateral tubercles. Suture rather simple.[2][3]
Fossils of species within this family have been found in the
Cretaceous sediments in Argentina, Austria, Bulgaria, Chile, Colombia, the Czech Republic, Czechoslovakia, France, Hungary, Italy, Mexico, Morocco, Portugal, Romania, Slovakia, Spain and Russia.[1][2]
References
^
ab"Holcodiscidae". Paleobiology Database. Retrieved 30 December 2021.
"Holcodiscidae". Encyclopedia of Life (EOL). Retrieved 30 December 2021.
Wright C.W. with J.H. Callomon and M.K. Howarth (1996). "Mollusca 4 Revised: Cretaceous Ammonoidea". In Roger L. Kaesler (ed.). Treatise on Invertebrate Paleontology Part L. Vol. 4. Boulder, Colorado and Lawrence, Kansas: The Geological Society of America & University of Kansas Press. p.
48 – via
Internet Archive.