Meanings
nounpsiloceratacean (plural psilocerataceans)
plural psilocerataceans
- Any ammonoid cephalopod of the superfamily Psilocerataceae.
Many British stratigraphers have historically used the first occurrence of the ammonite Psiloceras planorbis to indicate the base of the Jurassic, but elsewhere in Europe two other psiloceratacean ammonites appear before P.
2016 January 21, “The Oldest Jurassic Dinosaur: A Basal Neotheropod from the Hettangian of Great Britain”, in PLOS ONE, →DOI
Origin
Psilocerataceae + -an
Full word history & related roots →Cite this entry
APA
psiloceratacean. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/psiloceratacean
MLA
“psiloceratacean.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/psiloceratacean. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “psiloceratacean,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/psiloceratacean.
Source: psiloceratacean on Wiktionary, CC BY-SA 4.0.