Quadrus fridericus riona (Evans, 1953);  Comments: TL: Brazil (RJ) .

Quadrus fridericus riona HOLOTYPE ♂, specimen No. BMNH(E) 1236524 [BMNH].
  —   Photo taken by Nick V. Grishin. Any use of this image, except for personal study, requires prior written consent of the Natural History Museum, London