Piliocolobus gordonorum Matschie, 1900
Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin, p. 186
Current valid name: Piliocolobus gordonorum Matschie, 1900
Holotype: ZMB 86983, incomplete skin; “ Utshungwe-Gebirge ” [ Udzungwa Mountains], “Uhehe Gebiet” [formerly the territory of the Hehe people], southeast of Iringa, Tanzania; collected by von Gordon, undated.
Comment: Matschie mentioned that the Gordon brothers had collected two specimens. The skulls were lost during transport, and the two skins were damaged. One skin ended up in the Berlin Museum; the whereabouts of the second skin are unknown.