Ductina (Ductina) ductifrons (R. & R. Richter).
Ductina was completely blind having no eyes. This is an adaptation to environmental conditions. it either lived in very deep water or very murky water rendering eyes unnecessary. Fine well preserved complete outstretched specimen on grey shale.
Devonian, Famennian.
Wuppertal - Varresbeck, Germany.
Trilobite : 2.5 cm long.
