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The siphuncle is the tube between the septum walls that allows the shell to be filled with gas or water
Some Diplomystus fossils have been found that date back to the Late Cretaceous Period
The fossil consists of most of the face and mandible with teeth and
The orange bars in the photos are 10 centimeters for scale
Features skeletal structure and internal organs
Psychopyge elegans, trilobite (Replica) Stegosaurus The siphuncle is the tubeIn addition to its many spines this very unusual trilobite also has a large spine or appendage on the front of the head. This specimen is from the Hamar Laghdad Formation, Alnif region, Morocco. Trilobites are very well known, and possibly the second most famous fossil group after the dinosaurs with some 15,000 known species. Trilobites are extinct arthropods that form the class Trilobita. They appeared at the start of the Cambrian period and
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