This is a nice fossil  limulus, more precisely it is a Mesolimulus walchi from the lithographical limestone of Eichstaett. The horseshoe crab offers a nice and inflated preservation. The limulus is shown from the upper body side. Fossil horseshoe crabs are one of the most famous "Solnhofen Fossils".  Its maybe beside of there status a s living fossils also the very good preservation in a limulus in Solnhofen can be found.
This Limulus measures about 149 mm and the plate is unbroken.

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