China is the second-most primate-diverse country in Asia and is home to 3 families, 8 genera and 29 species of primates (Jiang et al., 2017). As the group of nocturnal strepsirrhine primates, two species of Lorisidae, Nycticebus bengalensis and N. pygmaeus, are generally reported in China (Brandon-Jones et al., 2004; Ji and Jiang, 2004; Jiang et al., 2017; Roos et al., 2014). Dao Van Tien (1960) proposed an intermediate species (N. intermedius) in Vietnam based on pelage characteristics and morphology, and it was listed as an independent species distributed sympatrically with N. pygmaeus in China by some researchers (Sheng et al., 1999; Zhang et al., 2002). A series of morphological and molecular genetic studies (Groves, 2001; Ratajszczak, 1998; Wang et al., 1996; Zhang et al., 1993) did not support the existence of this new loris species, and therefore N. pygmaeus is considered a distinct species with no subspecies and N. intermedius is considered a junior synonym for the species.