Shamonin, E. S.
Knyazev, V. G.
Dzyuba, O. S.
Article History
Received: 17 July 2022
Revised: 18 October 2022
Accepted: 18 November 2022
First Online: 13 July 2023
CONFLICT OF INTEREST
: The authors declare that they have no conflict of interest.
: Ammonite identifications and the section “<i>Arcticoceras cranocephaloide</i> Callomon et Birkelund, 1985 vs. <i>Catacadoceras barnstoni</i> (Meek, 1859)” were prepared by E.S. Shamonin with consultations by V.G. Knyazev. The sections “Material, methods and terminology” and “Systematic paleontology” were written by E.S. Shamonin, who also prepared the ammonite specimens and prepared them for publication including photography. The sections “Introduction”, “Position of the Catacadoceras barnstoni biostraton in the zonal ammonite scale of the Bathonian Stage of Siberia” and “Conclusions” were written by E.S. Shamonin together with O.S. Dzyuba (emphasis on comprehensive data analysis, taking into account information on associated groups of macrofauna).The same authors, as part of the field team of the IPGG SB RAS–NSU, studied the northern section near the village of Chekurovka in the lower reaches of the Lena River, where new fossils were collected. Ammonites from the Bathonian of Olenek Bay coast were collected by V.G. Knyazev.