Late Ordovician arachnomorph arthropods from the Anti-Atlas (Morocco)

Fossils of the arachnomorph arthropod Duslia Jahn, 1893 from the Upper Ktaoua Formation (Caradoc, Late Ordovician) of the Erfoud-Rissani-Alnif-Zagora area (south-eastern Morocco) are herein described. The fossils consist of imprints of approximately 50 dorsal exoskeletons. Previously unknown features of the cephalic shield and the telson-like structure are discussed. Some considerations on the mode of life are proposed.