Diademaproetus praecursor

Diademaproetus sp., a Devonian trilobite from Morocco, is similar to Cornuproetus in size and shape, but with a few morphological differences. The anterior border of Diademaproetus is elongated forming a 'tongue' or a sub-triangular cephalic process, whereas in Cornuproetus the glabella is rounded. The genal spines are long sometimes reaching the distal part of the pygidium. Both Diademaproetus and Cornuproetus have holochroal eye lenses.

The trilobite measures 1.45 inches long and 1.25 inches wide. Trilobite and matrix measures 2.85 by 3.4 by 1.45 inches. The lenses in the left eye are well-preserved.

There are repairs through the cephalic process, thorax and left genal spine.