Ctenocephalus coronatus (Barrande, 1846) with Ceratocystis perneri Jaekel, 1901.
Ctenocephalus had no eyes like some other Cambrian Trilobites. This would have been an adaptation to environmental conditions. Perfect complete outstretched specimen lying next to part of the calyx of a primitive Echinoderm.
Cambrian, Drumian Stage, Buchava Formation.
Skryje-Dlouha hora Hill, Czech Republic.
Trilobite : 3 cm long.
