This spiny Cyphaspides sp. is recognisable among Moroccan trilobites by the curling genal spines attached to the anterior margin (cephalon rim). This specimen is no exception to that rule, the spines have been revealed from the tomb of the matrix (limestone), which was once a sea-bed. The preparator has skilfully extracted each attribute of the exoskeleton. The characteristics clearly distinguishable, slightly raised eyestalks which protrude above the glabella (the central head shield) on bulbous-fixigene cheeks. The anterior margin has a fine frilly edge which runs part way down the lateral margins. Posteriorly of the glabella and occipital ring are completely free of any matrix. All thoracic (abdomen) segments, are vaulted, giving the appearance to little arthropod, of climbing over the rocky matrix block.
The axial lobe (central raised lobe) is inflated and this leads through to the pygidium (tail shield) similarly well defined. As are the pleural (pleura or pleural field-the mid thorax furrows) spines and two long pygidium spines. All these anatomical features are very crisp in detail and attractively preserved and conserved. A fine specimen, which can be clearly seen in the images above. Another classic fossil trilobite to grace most collections, superbly presented on the original fossil limestone seabed.