[Rockhounds] The Biggest Ammonite Fossil Ever Found

[Paul]

The Biggest Ammonite Fossil Ever Found Was A Whopping 1.8 Meters
Rachel Funnel. IFL Science, June 9, 2023
https://www.iflscience.com/the-biggest-ammonite-fossil-ever-found-was-a-whopping-18-meters-69332

Parapuzosia seppenradensis
https://en.wikipedia.org/wiki/Parapuzosia_seppenraden

An open access paper is:

Ifrim, C., Stinnesbeck, W., González González, A.H., Schorndorf, N.
and Gale, A.S., 2021. Ontogeny, evolution and palaeogeographic
distribution of the world’s largest ammonite Parapuzosia (P.) seppenradensis
(Landois, 1895). Plos one, 16(11), p.e0258510.
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0258510

Another (open access ?) paper is:

Scott, G. and Moore, M.H., 1928. Ammonites of enormous size
from the Texas Cretaceous. Journal of Paleontology, pp.273-279.
https://www.jstor.org/stable/1298015

Yours,

Paul H.