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Keywords: Trinucleus fimbriatus.png Trinucleus fimbriatus Trilobita Ptychopariida Trinucleidae Cephala fragments from Builth Welles Wales Main remarkable characters visible on these specimens a pits on the cephalic fringe; b strongly convex globose glabella; c inflated genae; d rarely preserved genal spines broken in this specimen This species lacks the typical compound eyes of most trilobites own Antonov Asaphida fossils Trinucleus |