Metacanthina issoumourensis used to be known as Asteropyge or Kayserops. Metacanthina issoumourensis is found in the Devonian deposits of the Laghdad Formation in Morocco.
The trilobite is 2.2 inches long and 1.3 inches wide. The matrix and the trilobite measure 3.2 by 3.0 by 1.0 inches. Both the eyes in this specimen have extremely well-preserved schizochoal lenses.
The specimen has been repaired across the mid-thorax