KEY TO THE SPECIES OF PROCTOPORUs 1a. Presence of prefrontals.......................................................... 2 1b. Absence of prefrontal scales..................................................... 3 2a. Smooth dorsal scales, single large elongate subocular, presence of large spines at the base of the sulcus spermaticus................................................. P. xestus 2b. Keeled dorsal scales, several small subocular scales.......................... P. chasqui 3a. Four supralabials anterior to the posteroventral angle of the subocular and two pair of genials in contact.............................................................. 4 3b. Three supralabials anterior to the posteroventral angle of the subocular and three pairs of genials in contact..................................................... P. iridescens 4a. Two to three supraoculars....................................................... 5 4b. Four supraoculars.................................................... P.pachyurus 5a. Venter uniformly dark or with dark stippling or mottling near lateral scale rows....... 6 5b. Venter clear yellow or orange without dark mottling....................... P. guentheri 6a. No continuous series of lateral ocelli.............................................. 7 6b. Continuous series of lateral ocelli....................................... P. unsaacae 7a. Frontonasal scale longer than frontal scale......................................... 8 7b. Frontonasal scale equal in length to frontal scale................................... 9 8a. Limbs overlapping when adpressed...................................... P. sucullucu 8b. Limbs not overlapping when adpressed................................. P. bolivianus 9a. First supraocular not fused with first superciliary................................. 10 9b. First supraocular fused with first superciliary............................. P. carabaya 10a. Absence of loreal scale................................................. P. lacertus 10b. Presence of loreal scale................................................ P. kiziriani

Published as part of Goicoechea, NoemÍ, Padial, José M., Chaparro, Juan Carlos, Castroviejo-Fisher, Santiago & Riva, Ignacio De La, 2013, A taxonomic revision of Proctoporus bolivianus Werner (Squamata: Gymnophthalmidae) with the description of three new species and resurrection of Proctoporus lacertus Stejneger, pp. 1-32 in American Museum Novitates 2013 (3786) on page 29, DOI: 10.1206/3786.1, http://zenodo.org/record/4565883