Diagnosis. Macroderes mutilans is similar to M. bias and M. fornicatus in having elytral intervals almost flat and matte, but can be separated from them in having impunctate lateral border of pronotum and different shape of internal sac  sclerite. From the former species it also differs in having elytral stria 9 widely separated from stria 10. Body length 9.8-11.8 mm, width 6.3-8.0 mm.

Macroderes mutilans

Distribution. Macroderes mutilans is known from a few localities in the Namaqualand, South Africa.

Macroderes mutilans, locality map