Cameral Membranes, Pseudosutures, and Other Soft Tissue Imprints in Ammonoid Shells Ammonoids occasionally show subtle structures linked with the attachment or contact of the soft body with the shell. Only some of these structures were mineralized and thus are rarely preserved. We describe mainly three different kinds of structures, namely (i)...

4th chapter by Polizzotto et al. summarised the knowledge on #Cameral #Membranes, #Pseudosutures, and Other Soft #Tissue Imprints in #Ammonoid Shells: doi.org/10.1007/978-...

New discoveries may help to explain their formation: link.springer.com/article/10.1...; doi.org/10.2110/palo...