Order Primates Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1 111 184 book chapter 0-8018-8221-4 10.5281/zenodo.7316519 Otolemur crassicaudatus subsp. kirkii Gray 1865 Synonyms: Otolemur crassicaudatus subsp. badius Matschie 1905 ; Otolemur crassicaudatus subsp. lonnbergi ( Schwarz 1930 ) ; Otolemur crassicaudatus subsp. umbrosus (Thomas 1917) .