After Geissmann, 2008

<==o Hylobatidae Gray, 1877 (gibbons; gibbonit)
   |?- †Bunopithecus sericus Matthew & Granger, 1923 [Hylobates (Bunopithecus)] Pleist. EA.
   |?- †Junzi imperialis Turvey, Bruun, Ortiz, Hansford, Hu, Ding, Zhang & Chatterjee, 2018; Hol. EAs.
   |--o Nomascus Miller, 1933 [Hylobates (Nomascus)] (crested gibbons)
   |  |--o N. sp. cf. nasutus (eastern black-crested gibbon)
   |  |  |-- N. sp. cf. nasutus (eastern black-crested gibbon)
   |  |  |-- N. sp. ssp.
   |  |  `-- N. sp. hainanus [N. concolor hainanus] (Hainan black-crested gibbon)
   |  `--+--o N. concolor (western black-crested gibbon; indokiinangibboni)
   |     |  |-- N. c. concolor (Tonkin black-crested gibbon)
   |     |  |-- N. c. ?furvogaster (west Yunnan black-crested gibbon)
   |     |  |-- N. c. ?jingdongensis (Jingdong black-crested gibbon)
   |     |  `-- N. c. ?lu (Laotian black-crested gibbon)
   |     `--+-- N. gabriellae (yellow-cheeked crested gibbon; indokiinangibboni)
   |        `--o N. leucogenys (white-cheeked crested gibbon; indokiinangibboni)
   |           |-- N. l. leucogenys (Northern white-cheeked crested gibbon)
   |           |-- N. l. siki (Southern white-cheeked crested gibbon)
   |           `?- N. l. henrici [not regognized by Geissmann]
   `--+--o Symphalangus syndactylus (Raffles, 1821) Gloger, 1841 (siamang; siamanki)
      |  |-- S. s. syndactylus (Sumatran siamang)
      |  |?- S. s. volzi [not regognized by Geissmann]
      |  `-- S. s. ?continentis (Malaysian siamang)
      `--+--o Hoolock Mootnick & Groves, 2005 (hulokit)
         |  |--o H. hoolock (Harlan, 1834) (Western hoolock gibbon)
         |  |  |-- H. h. hoolock
         |  |  `-- H. h. mishmiensis
         |  `--+-- H. leuconedys (Groves, 1967) (Eastern hoolock gibbon)
         |     `-- H. tianxing Fan et al., 2017 (Skywalker hoolock gibbon)
         `--o Hylobates Illiger, 1811 (lars; larit)
            |?- H. albibarbis Lyon, 1911 [ H. agilis albibarbis] (Bornean white-bearded gibbon)
            |-- H. pileatus (Gray, 1861) (pileated / capped gibbon; kalottigibboni)
            `--+--+-- H. klossii (Miller, 1903) (klossingibboni)
               |  `--o H. moloch(Audebert, 1798) (silvery gibbon; hopeagibboni)
               |     |-- H. m. moloch (western silvery / western Javan gibbon)
               |     `-- H. m. ?pongoalsoni (eastern silvery / central Javan gibbon)
               `--+--o H. muelleri Martin, 1841 [H. mülleri] (borneongibboni)
                  |  |-- H. m. muelleri (southern / Müller's gray gibbon)
                  |  |-- H. m. abbotti (Abbott's gray gibbon)
                  |  |-- H. m. funereus (northern gray gibbon)
                  |  `-- H. m. ssp.
                  `--+--o H. agilis F Cuvier, 1821 [Hylobates albo griseus Ludeking, 1862; Hylobates albo nigrescens Ludeking, 1862; Hylobates rafflei . Geoffroy, 1828; Hylobates unko Lesson, 1829] (notkeagibboni)
                     |  |-- H. a. agilis F Cuvier, 1821 (mountain agile gibbon)
                     |  `-- H. a. unko Lesson, 1829 (lowland agile gibbon)
                     `--o H. lar (Linnaeus, 1771) (lari)
                        |-- H. l. lar (Kloss's / Mentawai gibbon)
                        |-- H. l. carpenteri (Carpenter's / white-handed gibbon)
                        |-- H. l. entelloides (central lar / white-handed gibbon)
                        |-- H. l. vestitus (Sumatran lar / white-handed gibbon)
                        `-- †H. l. yunnanensis Ma & Wang, 1986 (Yunnan lar / white-handed gibbon) [not found in survey 2007]

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