Berriasella (Berriasella) callisto

Berriasella has a highly developed apophysis.

Ammonites have separate sexes and in some cases display a marked sexual dimorphism, in which micro- and macroshells are represented, which respectively must have corresponded to males and females. Adult microshells develop lateral processes; On the other hand, adult macroconchas maintain a shell with a simple peristome.