Report on ammonoid soft tissue remains revealed by computed tomography - Swiss Journal of Palaeontology Findings of ammonoid soft tissues are extremely rare compared to the rich fossil record of ammonoid conchs ranging from the Late Devonian to the Cretaceous/Paleogene boundary. Here, we apply the computed-tomography approach to detect ammonoid soft tissue remains in well-preserved fossils from the Early Cretaceous (early Albian) of NE-Germany of Proleymeriella. The ammonites were found in glauconitic–phosphatic sandstone boulders. Analyses of the high-resolution Ct-data revealed the presence of cameral sheets, the siphuncular tube wall, and the siphuncle itself. The siphuncle is a long, segmented soft tissue that begins at the rear end of the body chamber and comprises blood vessels. Chemical analyses using energy-dispersive spectroscopy (EDS) showed that all preserved soft tissues were phosphatized and are now composed of fluorapatite. The same holds true for preserved shell remains that locally show the nacreous microstructure. We provide a short description of these soft tissue remains and briefly discuss the taphonomic pathway.

13th chapter by Tanabe et al. shows Soft-Part #Anatomy of the #Siphuncle in #Ammonoids: rdcu.be/eJhAM

The structure for #buoyancy regulation is rarely preserved but #ComputedTomography reveals key details: rdcu.be/eJhAB

Also multiple new findings:
doi.org/10.2110/palo...
doi.org/10.2110/palo...

Happy #MolluscMonday
Check out this beautiful broken #Nautilus revealing the internal chambers, septa and the #siphuncle . There are some cool boring? traces as well
#Cephalopoda
#molluscsofsrilanka

Happy #MolluscMonday
Check out this beautiful broken #Nautilus revealing the.internal chambers, septa and the #siphuncle . There are some cool boring? traces as well
#Cephalopoda
#mollucsofsrilanka