“…Some researchers assigned Acanthosaura to the genus Gonocephalus (Smith, 1935) or included a number of species of Japalura (another genus of the same subfamily) in Acanthosaura (Boulenger, 1885). In the later half of the 20th century, the majority of researchers accepted the validity of the genus Acanthosaura (Wermuth, 1967;Moody, 1980;Manthey and Schuster, 1992;Ananjeva, 1997;Manthey and Grossmann, 1997), with four species, i.e., A. armata Gray, 1827, A. capra Günther, 1861, A. crucigera Boulenger, 1885, and A. lepidogaster Cuvier, 1829 To date, three species of Acanthosaura ( A. capra, A. crucigera , and A. lepidogaster ) have been recorded in the Vietnamese fauna (Taylor, 1963;Bobrov, 1995;Nguyen and Ho, 1996;Nguyen et al, 2005). The distribution and boundaries of particular species ranges are uncertain, because lizards of this genus are similar in morphology and no distinct diagnostic characters have been proposed.…”