Map of vouchered localities for Synophis bicolor populations: S. bicolorsensu stricto (purple circles), western S. aff. bicolor (blue circles), eastern S. aff. bicolor (yellow circles), and S. cf. bicolor (teal circles).

  Part of: Pyron RA, Guayasamin JM, PeƱafiel N, Bustamante L, Arteaga A (2015) Systematics of Nothopsini (Serpentes, Dipsadidae), with a new species of Synophis from the Pacific Andean slopes of southwestern Ecuador. ZooKeys 541: 109-147.