Bachia guianensis Hoogmoed & Dixon, 1977

Distribution: In the Orinoquia region of Venezuela and Colombia (Ribeiro-Júnior et al. 2016). In Colombia in the departments of Meta, Guaviare, Viachada and Guainía (Fig. 4B).

Similar species: Bachia guianensis is within the B. heteropa species group, being differentiable from the B. flavescens species group in having hexagonal to lanceolate dorsal scales (quadrangular in B. flavescens group). It can also be separated from the B. bresslaui group in having dorsals smooth (keeled in the species of the B. bresslaui group). Within the B. heteropa group it can be separated from the other species, except B. remota, by the absence of interparietal scale (present in B. alleni, B. heteropa, B. pallidiceps, and B. trinitatis). Moreover, B. guianensis can be easily distinguished from B. remota in having three supraciliary scales and by possessing prefrontal scales (two supraciliars and absence of prefrontals in B. remota). For a more detailed description see Hoogmoed & Dixon (1977) and Ribeiro-Júnior et al. (2016).