Anisoceras is a heteromorph ammonite belonging to the turrilitoid family Anisoceratidae. The shell forms a loose open helical spiral in the early stages, ending in one or two straight shafts in the mature adult.
Anisoceras is a heteromorph ammonite from the turrilitoid family Anisoceratidae. The shell starts as a loose open helical spiral in its early stages and ends up with one or two straight shafts in its mature adult form.