KEY TO THE SPECIES OF PROCTOPORUS TSCHUDI

1a. Two to three supraoculars........................................................................ 2

1b. Four supraoculars...................................................................... P. pachyurus

2a. Venter uniformly dark or with dark stippling or mottling near lateral scale rows.......................... 3

2b. Venter clear yellow or orange without dark mottling......................................... P. guentheri

3a. No continuous series of lateral ocelli............................................................... 4

3b. Continuous series of lateral ocelli......................................................... P. unsaacae

4a. Frontonasal scale longer than frontal scale................................................. P. sucullucu

4b. Frontonasal scale equal in length to frontal scale........................................... P. bolivianus