Bachia pyburni Kizirian & McDiarmid, 1998

Distribution: Northwestern Amazonia in Brazil, Venezuela, and Colombia (Ribeiro-Júnior et al. 2016). In Colombia in the eastern Amazonia, in the departments of Guaviare and Vaupés (Fig. 4B).

Similar species: Bachia pyburni belongs to the B. bresslaui group, being differentiable from B. flavescens in having hexagonal to lanceolate dorsal scales (quadrangular in B. flavescens). It can also be separated from the B. heteropa group in having keeled dorsals (smooth in B. heteropa species). This species also differs from its congenerics by the presence of lanceolated scales on the venter (quadrangular in B. flavescens, B. guianensis and B. heteropa). For a more detailed description see Kizirian & McDiarmid (1998).

Remarks: The type locality of this species is “Yapima, Vaupes, Colombia ” [ca. 1° 3' 0.0108'' N, 69° 28' 0.0084'' W].