Animalia > Chordata > Mammalia > Primates > Cercopithecidae > Trachypithecus > Trachypithecus crepusculus Trachypithecus crepusculus (Indochinese Gray Langur)Synonyms: Presbytis argenteus; Presbytis crepuscula wroughtoni; Trachypithecus phayrei crepuscula
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