Here is a negative of this relative rare "Ptychopariid Trilobite" from the Czech Middle Cambrian. | |||
Location: | Rejkovice-Potucek, Barrandium, Czech Republic | ||
| Size trilobite: | about 17 mm long | ||
| Age: | Middle Cambrian, Jince Formation, Eccaparadoxides pusillus Zone (about. 518 mill. y.o.) | ||