Abstract:
Gonatodes caudiscutatus is currently known from the Pacific coast of Ecuador, the Galapagos Archipelago and Peru (all west of the Andes). Here we provide the first records of this species from the Upper Amazon Basin east of the Andes in Ecuador. We found no morphometric or meristic differences between populations east and west of the Andes except in the number of loreals (fewer on eastern populations), and in the number of supraciliary spines (more individuals with higher number of supraciliary spines on western populations).
