- Galago crassicaudatus (É. Geoffroy Saint-Hilaire, 1812)
- Otolicnus crassicaudatus (H. R. Schinz, 1821)
- Callotus monteiri (Bartlett in J. E. Gray, 1863)
- Otogale crassicaudata (J. E. Gray, 1863)
- Otogale crassicaudata var. kirkii (J. E. Gray, 1865)
- Otogale Monteiri (J. E. Gray, 1871)
- Galago crassicaudata (P. L. Sclater, 1872)
- Galago monteiri (P. L. Sclater, 1872)
- Otolienus crassicaudatus (von Heuglin, 1877)
- Otogale crassicaudatus (A. T. de Rochebrune, 1883)
- Otolycnus crassicaudatus (Noack, 1887)
- Otogale kirki (O. Thomas, 1894)
- Galago kirki (Matschie, 1895)
- Otolemur badius Matschie, 1906
- Galago zuluensis (D. G. Elliot, 1907)
- Otolemur crassicaudatus A. Roberts, 1913
- Otolemur crassicaudatus kirki A. Roberts, 1913
- Galago badius (D. G. Elliot, 1913)
- Galago argentatus (Lönnberg, 1913)
- Galago crassicaudatus umbrosus (O. Thomas, 1917)
- Galago crassicaudatus lönnbergi (E. Schwarz, 1930)
- Otolemur crassicaudatus crassicaudatus Shortridge, 1934
- Otolemur crassicaudatus monteiri Shortridge, 1934
- Galago crassicaudatus lestradei (Schouteden, 1953)
- Galago (Otolemur) crassicaudatus monteiri (Hayman, 1963)
- Otolemur monteiri argentatus Grubb, Butynski, J. F. Oates, Bearder, Disotell, Groves, & Struhsaker, 2003
- Otolemur crassicaudatus kirkii Grubb, Butynski, J. F. Oates, Bearder, Disotell, Groves, & Struhsaker, 2003
- Otolemur monteiri Grubb, Butynski, J. F. Oates, Bearder, Disotell, Groves, & Struhsaker, 2003
- Otolemur monteiri monteiri Grubb, Butynski, J. F. Oates, Bearder, Disotell, Groves, & Struhsaker, 2003
- Otolemur crassicaudatus argentatus Mittermeier, Rylands, & D. E. Wilson, 2013
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