Neseuretus (Neseuretus) tristani Brongniart.
Perfect complete 3D specimen on black shale. from a famous old locality.
Ordovician, Uppermost Llanvirn series,'Llandeilian' Stage.
Camaret, Crozon Peninsular, Cap Finisterre, Brittany, France.
Trilobite : 3 x 2.6 cm.
