The French magazine 'fossiles' recently published a very complete and richly illustrated article about uncoiled ammonites from the western inland sea (Upper Cretaceous –North America)
Fossiles, n°39, juillet-août-septembre 2019 ; pages 5 to 42 (in french language…); -quarterly review by annual subscription-
www.minerauxetfossiles.com
revue fossiles002.pdf