Jurassic Nautilus Cross Section
Sectioned Nautiloid
Upper Jurassic
Tulear, Madagascar
This specimen is a sectioned Nautiloid from the Upper Jurassic ammonite locality. This specimen shows that the phragmocone chambers were fossilized by crystalline calcite. The cross section reveals the siphuncle and its function to connect the chambers for passing of fluid or gas.
$40